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                  <a href="#GwyDataLine.description" class="shortcut">Description</a>
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                  <a href="#GwyDataLine.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<h2><span class="refentrytitle"><a name="GwyDataLine.top_of_page"></a>GwyDataLine</span></h2>
<p>GwyDataLine — One-dimensional data representation</p>
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<div class="refsynopsisdiv">
<a name="GwyDataLine.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;libprocess/gwyprocess.h&gt;

struct              <a class="link" href="GwyDataLine.html#GwyDataLine-struct" title="struct GwyDataLine">GwyDataLine</a>;
struct              <a class="link" href="GwyDataLine.html#GwyDataLineClass" title="struct GwyDataLineClass">GwyDataLineClass</a>;
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-add" title="gwy_data_line_add ()">gwy_data_line_add</a>                   (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-clear" title="gwy_data_line_clear ()">gwy_data_line_clear</a>                 (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-copy" title="gwy_data_line_copy ()">gwy_data_line_copy</a>                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *b</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-cumulate" title="gwy_data_line_cumulate ()">gwy_data_line_cumulate</a>              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-data-changed" title="gwy_data_line_data_changed ()">gwy_data_line_data_changed</a>          (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
#define             <a class="link" href="GwyDataLine.html#gwy-data-line-duplicate" title="gwy_data_line_duplicate()">gwy_data_line_duplicate</a>             (data_line)
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-fill" title="gwy_data_line_fill ()">gwy_data_line_fill</a>                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> *           <a class="link" href="GwyDataLine.html#gwy-data-line-fit-polynom" title="gwy_data_line_fit_polynom ()">gwy_data_line_fit_polynom</a>           (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> n</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *coeffs</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> *           <a class="link" href="GwyDataLine.html#gwy-data-line-get-data" title="gwy_data_line_get_data ()">gwy_data_line_get_data</a>              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
const <a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> *     <a class="link" href="GwyDataLine.html#gwy-data-line-get-data-const" title="gwy_data_line_get_data_const ()">gwy_data_line_get_data_const</a>        (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataLine.html#gwy-data-line-get-der" title="gwy_data_line_get_der ()">gwy_data_line_get_der</a>               (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataLine.html#gwy-data-line-get-dval" title="gwy_data_line_get_dval ()">gwy_data_line_get_dval</a>              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> x</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> interpolation</code></em>);
<a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataLine.html#gwy-data-line-get-dval-real" title="gwy_data_line_get_dval_real ()">gwy_data_line_get_dval_real</a>         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> x</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> interpolation</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-get-line-coeffs" title="gwy_data_line_get_line_coeffs ()">gwy_data_line_get_line_coeffs</a>       (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *av</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *bv</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataLine.html#gwy-data-line-get-offset" title="gwy_data_line_get_offset ()">gwy_data_line_get_offset</a>            (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataLine.html#gwy-data-line-get-real" title="gwy_data_line_get_real ()">gwy_data_line_get_real</a>              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                <a class="link" href="GwyDataLine.html#gwy-data-line-get-res" title="gwy_data_line_get_res ()">gwy_data_line_get_res</a>               (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
<a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="returnvalue">GwySIUnit</span></a> *         <a class="link" href="GwyDataLine.html#gwy-data-line-get-si-unit-x" title="gwy_data_line_get_si_unit_x ()">gwy_data_line_get_si_unit_x</a>         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
<a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="returnvalue">GwySIUnit</span></a> *         <a class="link" href="GwyDataLine.html#gwy-data-line-get-si-unit-y" title="gwy_data_line_get_si_unit_y ()">gwy_data_line_get_si_unit_y</a>         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataLine.html#gwy-data-line-get-val" title="gwy_data_line_get_val ()">gwy_data_line_get_val</a>               (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>);
<a href="./../libgwyddion/libgwyddion/GwySIUnit.html#GwySIValueFormat"><span class="returnvalue">GwySIValueFormat</span></a> *  <a class="link" href="GwyDataLine.html#gwy-data-line-get-value-format-x" title="gwy_data_line_get_value_format_x ()">gwy_data_line_get_value_format_x</a>    (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/libgwyddion-gwyddionenums.html#GwySIUnitFormatStyle"><span class="type">GwySIUnitFormatStyle</span></a> style</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html#GwySIValueFormat"><span class="type">GwySIValueFormat</span></a> *format</code></em>);
<a href="./../libgwyddion/libgwyddion/GwySIUnit.html#GwySIValueFormat"><span class="returnvalue">GwySIValueFormat</span></a> *  <a class="link" href="GwyDataLine.html#gwy-data-line-get-value-format-y" title="gwy_data_line_get_value_format_y ()">gwy_data_line_get_value_format_y</a>    (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/libgwyddion-gwyddionenums.html#GwySIUnitFormatStyle"><span class="type">GwySIUnitFormatStyle</span></a> style</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html#GwySIValueFormat"><span class="type">GwySIValueFormat</span></a> *format</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-invert" title="gwy_data_line_invert ()">gwy_data_line_invert</a>                (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> x</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> z</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataLine.html#gwy-data-line-itor" title="gwy_data_line_itor ()">gwy_data_line_itor</a>                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> pixpos</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-line-level" title="gwy_data_line_line_level ()">gwy_data_line_line_level</a>            (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> av</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> bv</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-line-rotate" title="gwy_data_line_line_rotate ()">gwy_data_line_line_rotate</a>           (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> angle</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> interpolation</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-multiply" title="gwy_data_line_multiply ()">gwy_data_line_multiply</a>              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);
<a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="returnvalue">GwyDataLine</span></a> *       <a class="link" href="GwyDataLine.html#gwy-data-line-new" title="gwy_data_line_new ()">gwy_data_line_new</a>                   (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> res</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> real</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> nullme</code></em>);
<a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="returnvalue">GwyDataLine</span></a> *       <a class="link" href="GwyDataLine.html#gwy-data-line-new-alike" title="gwy_data_line_new_alike ()">gwy_data_line_new_alike</a>             (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *model</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> nullme</code></em>);
<a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="returnvalue">GwyDataLine</span></a> *       <a class="link" href="GwyDataLine.html#gwy-data-line-new-resampled" title="gwy_data_line_new_resampled ()">gwy_data_line_new_resampled</a>         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> res</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyInterpolationType" title="enum GwyInterpolationType"><span class="type">GwyInterpolationType</span></a> interpolation</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-part-add" title="gwy_data_line_part_add ()">gwy_data_line_part_add</a>              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-part-clear" title="gwy_data_line_part_clear ()">gwy_data_line_part_clear</a>            (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>);
<a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="returnvalue">GwyDataLine</span></a> *       <a class="link" href="GwyDataLine.html#gwy-data-line-part-extract" title="gwy_data_line_part_extract ()">gwy_data_line_part_extract</a>          (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> len</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-part-fill" title="gwy_data_line_part_fill ()">gwy_data_line_part_fill</a>             (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> *           <a class="link" href="GwyDataLine.html#gwy-data-line-part-fit-polynom" title="gwy_data_line_part_fit_polynom ()">gwy_data_line_part_fit_polynom</a>      (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> n</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *coeffs</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-part-multiply" title="gwy_data_line_part_multiply ()">gwy_data_line_part_multiply</a>         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-part-subtract-polynom" title="gwy_data_line_part_subtract_polynom ()">gwy_data_line_part_subtract_polynom</a> (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> n</code></em>,
                                                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *coeffs</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                <a class="link" href="GwyDataLine.html#gwy-data-line-part-threshold" title="gwy_data_line_part_threshold ()">gwy_data_line_part_threshold</a>        (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> threshval</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> bottom</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> top</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-resample" title="gwy_data_line_resample ()">gwy_data_line_resample</a>              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> res</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyInterpolationType" title="enum GwyInterpolationType"><span class="type">GwyInterpolationType</span></a> interpolation</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-resize" title="gwy_data_line_resize ()">gwy_data_line_resize</a>                (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-rotate" title="gwy_data_line_rotate ()">gwy_data_line_rotate</a>                (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> angle</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyInterpolationType" title="enum GwyInterpolationType"><span class="type">GwyInterpolationType</span></a> interpolation</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             <a class="link" href="GwyDataLine.html#gwy-data-line-rtoi" title="gwy_data_line_rtoi ()">gwy_data_line_rtoi</a>                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> realpos</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-set-offset" title="gwy_data_line_set_offset ()">gwy_data_line_set_offset</a>            (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> offset</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-set-real" title="gwy_data_line_set_real ()">gwy_data_line_set_real</a>              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> real</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-set-si-unit-x" title="gwy_data_line_set_si_unit_x ()">gwy_data_line_set_si_unit_x</a>         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="type">GwySIUnit</span></a> *si_unit</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-set-si-unit-y" title="gwy_data_line_set_si_unit_y ()">gwy_data_line_set_si_unit_y</a>         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="type">GwySIUnit</span></a> *si_unit</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-set-val" title="gwy_data_line_set_val ()">gwy_data_line_set_val</a>               (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-sqrt" title="gwy_data_line_sqrt ()">gwy_data_line_sqrt</a>                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GwyDataLine.html#gwy-data-line-subtract-polynom" title="gwy_data_line_subtract_polynom ()">gwy_data_line_subtract_polynom</a>      (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> n</code></em>,
                                                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *coeffs</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                <a class="link" href="GwyDataLine.html#gwy-data-line-threshold" title="gwy_data_line_threshold ()">gwy_data_line_threshold</a>             (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> threshval</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> bottom</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> top</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GwyDataLine.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
   +----GwyDataLine
</pre>
</div>
<div class="refsect1">
<a name="GwyDataLine.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GwyDataLine implements
 <a href="./../libgwyddion/libgwyddion/GwySerializable.html">GwySerializable</a>.</p>
</div>
<div class="refsect1">
<a name="GwyDataLine.signals"></a><h2>Signals</h2>
<pre class="synopsis">
  "<a class="link" href="GwyDataLine.html#GwyDataLine-data-changed" title='The "data-changed" signal'>data-changed</a>"                                   : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a>
</pre>
</div>
<div class="refsect1">
<a name="GwyDataLine.description"></a><h2>Description</h2>
<p>
<a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> represents 1D data arrays in Gwyddion. It is used for most of
the data processing functions connected with 1D data, graphs, etc.
</p>
</div>
<div class="refsect1">
<a name="GwyDataLine.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GwyDataLine-struct"></a><h3>struct GwyDataLine</h3>
<pre class="programlisting">struct GwyDataLine;</pre>
<p>
The <a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> struct contains private data only and should be accessed
using the functions below.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataLineClass"></a><h3>struct GwyDataLineClass</h3>
<pre class="programlisting">struct GwyDataLineClass {
    GObjectClass parent_class;

    void (*data_changed)(GwyDataLine *data_line);
    void (*reserved1)(void);
};
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-add"></a><h3>gwy_data_line_add ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_add                   (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);</pre>
<p>
Adds a specified value to all values in a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>Value to be added.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-clear"></a><h3>gwy_data_line_clear ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_clear                 (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Fills a data line with zeroes.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-copy"></a><h3>gwy_data_line_copy ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_copy                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *b</code></em>);</pre>
<p>
Copies the contents of a data line to another already allocated data line
of the same size.
</p>
<p>
</p>
<div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>Semantic of method differs from <a class="link" href="GwyDataField.html#gwy-data-field-copy" title="gwy_data_field_copy ()"><code class="function">gwy_data_field_copy()</code></a>, it copies
only data.  It will be probably changed.</div>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>Source data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>b</code></em> :</span></p></td>
<td>Destination data line.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-cumulate"></a><h3>gwy_data_line_cumulate ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_cumulate              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Transforms a distribution in a data line to cummulative distribution.
</p>
<p>
Each element becomes sum of all previous elements in the line, including
self.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-data-changed"></a><h3>gwy_data_line_data_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_data_changed          (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Emits signal "data_changed" on a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-duplicate"></a><h3>gwy_data_line_duplicate()</h3>
<pre class="programlisting">#define             gwy_data_line_duplicate(data_line)</pre>
<p>
Convenience macro doing <a href="./../libgwyddion/libgwyddion/GwySerializable.html#gwy-serializable-duplicate"><code class="function">gwy_serializable_duplicate()</code></a> with all the necessary
typecasting.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line to duplicate.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-fill"></a><h3>gwy_data_line_fill ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_fill                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);</pre>
<p>
Fills a data line with specified value.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>Value to fill data line with.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-fit-polynom"></a><h3>gwy_data_line_fit_polynom ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> *           gwy_data_line_fit_polynom           (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> n</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *coeffs</code></em>);</pre>
<p>
Fits a polynomial through a data line.
</p>
<p>
Note <em class="parameter"><code>n</code></em> is polynomial degree, so the size of <em class="parameter"><code>coeffs</code></em> is <em class="parameter"><code>n</code></em>+1.  X-values
are indices in the data line.
</p>
<p>
For polynomials of degree 0 and 1 it's better to use <a class="link" href="libgwyprocess-linestats.html#gwy-data-line-get-avg" title="gwy_data_line_get_avg ()"><code class="function">gwy_data_line_get_avg()</code></a>
and <code class="function">gwy_data_line_line_coeffs()</code> because they are faster.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>Polynom degree.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>coeffs</code></em> :</span></p></td>
<td>An array of size <em class="parameter"><code>n</code></em>+1 to store the coefficients to, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
(a fresh array is allocated then).</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The coefficients of the polynomial (<em class="parameter"><code>coeffs</code></em> when it was not <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>,
otherwise a newly allocated array).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-data"></a><h3>gwy_data_line_get_data ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> *           gwy_data_line_get_data              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Gets the raw data buffer of a data line.
</p>
<p>
The returned buffer is not guaranteed to be valid through whole data
line life time.  Some function may change it, most notably
<a class="link" href="GwyDataLine.html#gwy-data-line-resize" title="gwy_data_line_resize ()"><code class="function">gwy_data_line_resize()</code></a> and <a class="link" href="GwyDataLine.html#gwy-data-line-resample" title="gwy_data_line_resample ()"><code class="function">gwy_data_line_resample()</code></a>.
</p>
<p>
This function invalidates any cached information, use
<a class="link" href="GwyDataLine.html#gwy-data-line-get-data-const" title="gwy_data_line_get_data_const ()"><code class="function">gwy_data_line_get_data_const()</code></a> if you are not going to change the data.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The data as an array of doubles of length <a class="link" href="GwyDataLine.html#gwy-data-line-get-res" title="gwy_data_line_get_res ()"><code class="function">gwy_data_line_get_res()</code></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-data-const"></a><h3>gwy_data_line_get_data_const ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> *     gwy_data_line_get_data_const        (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Gets the raw data buffer of a data line, read-only.
</p>
<p>
The returned buffer is not guaranteed to be valid through whole data
line life time.  Some function may change it, most notably
<a class="link" href="GwyDataLine.html#gwy-data-line-resize" title="gwy_data_line_resize ()"><code class="function">gwy_data_line_resize()</code></a> and <a class="link" href="GwyDataLine.html#gwy-data-line-resample" title="gwy_data_line_resample ()"><code class="function">gwy_data_line_resample()</code></a>.
</p>
<p>
Use <a class="link" href="GwyDataLine.html#gwy-data-line-get-data" title="gwy_data_line_get_data ()"><code class="function">gwy_data_line_get_data()</code></a> if you want to change the data.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The data as an array of doubles of length <a class="link" href="GwyDataLine.html#gwy-data-line-get-res" title="gwy_data_line_get_res ()"><code class="function">gwy_data_line_get_res()</code></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-der"></a><h3>gwy_data_line_get_der ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_line_get_der               (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>);</pre>
<p>
Computes central derivaltion at given index in a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>Pixel coordinate.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Derivation at given position.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-dval"></a><h3>gwy_data_line_get_dval ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_line_get_dval              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> x</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> interpolation</code></em>);</pre>
<p>
Gets interpolated value at arbitrary data line point indexed by pixel
coordinates.
</p>
<p>
Note pixel values are centered in intervals [<em class="parameter"><code>j</code></em>, <em class="parameter"><code>j</code></em>+1], so to get the same
value as gwy_data_line_get_val(<em class="parameter"><code>data_line</code></em>, <em class="parameter"><code>j</code></em>) returns,
it's necessary to add 0.5:
gwy_data_line_get_dval(<em class="parameter"><code>data_line</code></em>, <em class="parameter"><code>j</code></em>+0.5, <em class="parameter"><code>interpolation</code></em>).
</p>
<p>
See also <a class="link" href="GwyDataLine.html#gwy-data-line-get-dval-real" title="gwy_data_line_get_dval_real ()"><code class="function">gwy_data_line_get_dval_real()</code></a> that does the same, but takes
real coordinates.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td>Position in data line in range [0, resolution].  If the value is outside
this range, the nearest border value is returned.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>interpolation</code></em> :</span></p></td>
<td>Interpolation method to use.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Value interpolated in the data line.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-dval-real"></a><h3>gwy_data_line_get_dval_real ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_line_get_dval_real         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> x</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> interpolation</code></em>);</pre>
<p>
Gets interpolated value at arbitrary data line point indexed by real
coordinates.
</p>
<p>
See also <a class="link" href="GwyDataLine.html#gwy-data-line-get-dval" title="gwy_data_line_get_dval ()"><code class="function">gwy_data_line_get_dval()</code></a> for interpolation explanation.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td>real coordinates position</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>interpolation</code></em> :</span></p></td>
<td>interpolation method used</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Value interpolated in the data line.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-line-coeffs"></a><h3>gwy_data_line_get_line_coeffs ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_get_line_coeffs       (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *av</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *bv</code></em>);</pre>
<p>
Finds line leveling coefficients.
</p>
<p>
The coefficients can be used for line leveling using relation
data[i] := data[i] - (av + bv*i);
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>av</code></em> :</span></p></td>
<td>Height coefficient.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>bv</code></em> :</span></p></td>
<td>Slope coeficient.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-offset"></a><h3>gwy_data_line_get_offset ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_line_get_offset            (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Gets the offset of data line origin.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Offset value.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-real"></a><h3>gwy_data_line_get_real ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_line_get_real              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Gets the physical size of a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Real size of data line.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-res"></a><h3>gwy_data_line_get_res ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                gwy_data_line_get_res               (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Gets the number of data points in a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Resolution (number of data points).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-si-unit-x"></a><h3>gwy_data_line_get_si_unit_x ()</h3>
<pre class="programlisting"><a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="returnvalue">GwySIUnit</span></a> *         gwy_data_line_get_si_unit_x         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Returns lateral SI unit of a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>SI unit corresponding to the lateral (X) dimension of the data
line.  Its reference count is not incremented.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-si-unit-y"></a><h3>gwy_data_line_get_si_unit_y ()</h3>
<pre class="programlisting"><a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="returnvalue">GwySIUnit</span></a> *         gwy_data_line_get_si_unit_y         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Returns value SI unit of a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>SI unit corresponding to the "height" (Z) dimension of the data
line.  Its reference count is not incremented.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-val"></a><h3>gwy_data_line_get_val ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_line_get_val               (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>);</pre>
<p>
Gets value at given position in a data line.
</p>
<p>
Do not access data with this function inside inner loops, it's slow.
Get raw data buffer with <a class="link" href="GwyDataLine.html#gwy-data-line-get-data-const" title="gwy_data_line_get_data_const ()"><code class="function">gwy_data_line_get_data_const()</code></a> and access it
directly instead.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>Position in the line (index).</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Value at given index.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-value-format-x"></a><h3>gwy_data_line_get_value_format_x ()</h3>
<pre class="programlisting"><a href="./../libgwyddion/libgwyddion/GwySIUnit.html#GwySIValueFormat"><span class="returnvalue">GwySIValueFormat</span></a> *  gwy_data_line_get_value_format_x    (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/libgwyddion-gwyddionenums.html#GwySIUnitFormatStyle"><span class="type">GwySIUnitFormatStyle</span></a> style</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html#GwySIValueFormat"><span class="type">GwySIValueFormat</span></a> *format</code></em>);</pre>
<p>
Finds value format good for displaying coordinates of a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>style</code></em> :</span></p></td>
<td>Unit format style.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>A SI value format to modify, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to allocate a new one.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The value format.  If <em class="parameter"><code>format</code></em> is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, a newly allocated format
is returned, otherwise (modified) <em class="parameter"><code>format</code></em> itself is returned.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-get-value-format-y"></a><h3>gwy_data_line_get_value_format_y ()</h3>
<pre class="programlisting"><a href="./../libgwyddion/libgwyddion/GwySIUnit.html#GwySIValueFormat"><span class="returnvalue">GwySIValueFormat</span></a> *  gwy_data_line_get_value_format_y    (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/libgwyddion-gwyddionenums.html#GwySIUnitFormatStyle"><span class="type">GwySIUnitFormatStyle</span></a> style</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html#GwySIValueFormat"><span class="type">GwySIValueFormat</span></a> *format</code></em>);</pre>
<p>
Finds value format good for displaying values of a data line.
</p>
<p>
Note this functions searches for minimum and maximum value in <em class="parameter"><code>data_line</code></em>,
therefore it's relatively slow.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>style</code></em> :</span></p></td>
<td>Unit format style.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>A SI value format to modify, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to allocate a new one.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The value format.  If <em class="parameter"><code>format</code></em> is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, a newly allocated format
is returned, otherwise (modified) <em class="parameter"><code>format</code></em> itself is returned.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-invert"></a><h3>gwy_data_line_invert ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_invert                (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> x</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> z</code></em>);</pre>
<p>
Reflects amd/or inverts a data line.
</p>
<p>
In the case of value reflection, it's inverted about mean value.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td>Whether to invert data point order.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z</code></em> :</span></p></td>
<td>Whether to invert in Z direction (i.e., invert values).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-itor"></a><h3>gwy_data_line_itor ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_line_itor                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> pixpos</code></em>);</pre>
<p>
Transforms pixel coordinate to real (physical) coordinate.
</p>
<p>
That is it maps range [0..resolution] to range [0..real-size].  It is not
suitable for conversion of matrix indices to physical coordinates, you
have to use gwy_data_line_itor(<em class="parameter"><code>data_line</code></em>, <em class="parameter"><code>pixpos</code></em> + 0.5) for that.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixpos</code></em> :</span></p></td>
<td>Pixel coordinate.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<em class="parameter"><code>pixpos</code></em> in real coordinates.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-line-level"></a><h3>gwy_data_line_line_level ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_line_level            (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> av</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> bv</code></em>);</pre>
<p>
Performs line leveling.
</p>
<p>
See <a class="link" href="GwyDataLine.html#gwy-data-line-get-line-coeffs" title="gwy_data_line_get_line_coeffs ()"><code class="function">gwy_data_line_get_line_coeffs()</code></a> for deails.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>av</code></em> :</span></p></td>
<td>Height coefficient.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>bv</code></em> :</span></p></td>
<td>Slope coefficient.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-line-rotate"></a><h3>gwy_data_line_line_rotate ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_line_rotate           (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> angle</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> interpolation</code></em>);</pre>
<div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">gwy_data_line_line_rotate</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
Performs line rotation.
</p>
<p>
Use <a class="link" href="GwyDataLine.html#gwy-data-line-rotate" title="gwy_data_line_rotate ()"><code class="function">gwy_data_line_rotate()</code></a> instead.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>angle</code></em> :</span></p></td>
<td>Angle of rotation (in radians), counterclockwise.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>interpolation</code></em> :</span></p></td>
<td>Interpolation method to use (can be only of two-point type).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-multiply"></a><h3>gwy_data_line_multiply ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_multiply              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);</pre>
<p>
Multiplies all values in a data line with a specified value.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>Value to multiply data line with.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-new"></a><h3>gwy_data_line_new ()</h3>
<pre class="programlisting"><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="returnvalue">GwyDataLine</span></a> *       gwy_data_line_new                   (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> res</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> real</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> nullme</code></em>);</pre>
<p>
Creates a new data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>res</code></em> :</span></p></td>
<td>Resolution, i.e., the number of samples.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>real</code></em> :</span></p></td>
<td>Real physical dimension.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>nullme</code></em> :</span></p></td>
<td>Whether the data line should be initialized to zeroes. If <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>,
the data will not be initialized.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly created data line.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-new-alike"></a><h3>gwy_data_line_new_alike ()</h3>
<pre class="programlisting"><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="returnvalue">GwyDataLine</span></a> *       gwy_data_line_new_alike             (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *model</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> nullme</code></em>);</pre>
<p>
Creates a new data line similar to an existing one.
</p>
<p>
Use <a class="link" href="GwyDataLine.html#gwy-data-line-duplicate" title="gwy_data_line_duplicate()"><code class="function">gwy_data_line_duplicate()</code></a> if you want to copy a data line including
data.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>model</code></em> :</span></p></td>
<td>A data line to take resolutions and units from.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>nullme</code></em> :</span></p></td>
<td>Whether the data line should be initialized to zeroes. If <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>,
the data will not be initialized.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly created data line.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-new-resampled"></a><h3>gwy_data_line_new_resampled ()</h3>
<pre class="programlisting"><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="returnvalue">GwyDataLine</span></a> *       gwy_data_line_new_resampled         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> res</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyInterpolationType" title="enum GwyInterpolationType"><span class="type">GwyInterpolationType</span></a> interpolation</code></em>);</pre>
<p>
Creates a new data line by resampling an existing one.
</p>
<p>
This method is equivalent to <a class="link" href="GwyDataLine.html#gwy-data-line-duplicate" title="gwy_data_line_duplicate()"><code class="function">gwy_data_line_duplicate()</code></a> followed by
<a class="link" href="GwyDataLine.html#gwy-data-line-resample" title="gwy_data_line_resample ()"><code class="function">gwy_data_line_resample()</code></a>, but it is more efficient.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>res</code></em> :</span></p></td>
<td>Desired resolution.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>interpolation</code></em> :</span></p></td>
<td>Interpolation method to use.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly created data line.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.1</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-part-add"></a><h3>gwy_data_line_part_add ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_part_add              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);</pre>
<p>
Adds specified value to all values in a part of a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td>
<td>Index the line part starts at.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td>
<td>Index the line part ends at + 1.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>Value to be added</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-part-clear"></a><h3>gwy_data_line_part_clear ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_part_clear            (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>);</pre>
<p>
Fills a data line part with zeroes.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td>
<td>Index the line part starts at.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td>
<td>Index the line part ends at + 1.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-part-extract"></a><h3>gwy_data_line_part_extract ()</h3>
<pre class="programlisting"><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="returnvalue">GwyDataLine</span></a> *       gwy_data_line_part_extract          (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> len</code></em>);</pre>
<p>
Extracts a part of a data line to a new data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td>
<td>Where to start.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>len</code></em> :</span></p></td>
<td>Length of extracted segment.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The extracted area as a newly created data line.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-part-fill"></a><h3>gwy_data_line_part_fill ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_part_fill             (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);</pre>
<p>
Fills specified part of data line with specified number
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td>
<td>Index the line part starts at.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td>
<td>Index the line part ends at + 1.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>Value to fill data line part with.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-part-fit-polynom"></a><h3>gwy_data_line_part_fit_polynom ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a> *           gwy_data_line_part_fit_polynom      (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> n</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *coeffs</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>);</pre>
<p>
Fits a polynomial through a part of a data line.
</p>
<p>
Please see <a class="link" href="GwyDataLine.html#gwy-data-line-fit-polynom" title="gwy_data_line_fit_polynom ()"><code class="function">gwy_data_line_fit_polynom()</code></a> for more details.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>Polynom degree.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>coeffs</code></em> :</span></p></td>
<td>An array of size <em class="parameter"><code>n</code></em>+1 to store the coefficients to, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
(a fresh array is allocated then).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td>
<td>Index the line part starts at.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td>
<td>Index the line part ends at + 1.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The coefficients of the polynomial (<em class="parameter"><code>coeffs</code></em> when it was not <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>,
otherwise a newly allocated array).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-part-multiply"></a><h3>gwy_data_line_part_multiply ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_part_multiply         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);</pre>
<p>
Multiplies all values in a part of data line by specified value.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td>
<td>Index the line part starts at.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td>
<td>Index the line part ends at + 1.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>Value multiply data line part with.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-part-subtract-polynom"></a><h3>gwy_data_line_part_subtract_polynom ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_part_subtract_polynom (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> n</code></em>,
                                                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *coeffs</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>);</pre>
<p>
Subtracts a polynomial from a part of a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>Polynom degree.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>coeffs</code></em> :</span></p></td>
<td>An array of size <em class="parameter"><code>n</code></em>+1 with polynomial coefficients to.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td>
<td>Index the line part starts at.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td>
<td>Index the line part ends at + 1.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-part-threshold"></a><h3>gwy_data_line_part_threshold ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                gwy_data_line_part_threshold        (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> threshval</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> bottom</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> top</code></em>);</pre>
<p>
Sets all the values within interval to <em class="parameter"><code>bottom</code></em> or <em class="parameter"><code>top</code></em> value
depending on whether the original values are
below or above <em class="parameter"><code>threshold</code></em> value.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td>
<td>Index the line part starts at.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td>
<td>Index the line part ends at + 1.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>threshval</code></em> :</span></p></td>
<td>Threshold value.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>bottom</code></em> :</span></p></td>
<td>Lower replacement value.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>top</code></em> :</span></p></td>
<td>Upper replacement value.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>total number of values above threshold within interval</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-resample"></a><h3>gwy_data_line_resample ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_resample              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> res</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyInterpolationType" title="enum GwyInterpolationType"><span class="type">GwyInterpolationType</span></a> interpolation</code></em>);</pre>
<p>
Resamples a data line.
</p>
<p>
In other words changes the size of one dimensional field related with data
line. The original values are used for resampling using a requested
interpolation alorithm.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>res</code></em> :</span></p></td>
<td>Desired resolution.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>interpolation</code></em> :</span></p></td>
<td>Interpolation method to use.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-resize"></a><h3>gwy_data_line_resize ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_resize                (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> from</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> to</code></em>);</pre>
<p>
Resizes (crops) a data line.
</p>
<p>
Extracts a part of data line in range <em class="parameter"><code>from</code></em>..(<em class="parameter"><code>to</code></em>-1), recomputing real
sizes.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>from</code></em> :</span></p></td>
<td>Where to start.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>to</code></em> :</span></p></td>
<td>Where to finish + 1.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-rotate"></a><h3>gwy_data_line_rotate ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_rotate                (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> angle</code></em>,
                                                         <em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyInterpolationType" title="enum GwyInterpolationType"><span class="type">GwyInterpolationType</span></a> interpolation</code></em>);</pre>
<p>
Performs line rotation.
</p>
<p>
This is operation similar to leveling, but it does not change the angles
between line segments (on the other hand it introduces other deformations
due to discretization).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>angle</code></em> :</span></p></td>
<td>Angle of rotation (in radians), counterclockwise.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>interpolation</code></em> :</span></p></td>
<td>Interpolation method to use (can be only of two-point type).</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.7</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-rtoi"></a><h3>gwy_data_line_rtoi ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="returnvalue">gdouble</span></a>             gwy_data_line_rtoi                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> realpos</code></em>);</pre>
<p>
Transforms real (physical) coordinate to pixel coordinate.
</p>
<p>
That is it maps range [0..real-size] to range [0..resolution].
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>realpos</code></em> :</span></p></td>
<td>Real coordinate.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<em class="parameter"><code>realpos</code></em> in pixel coordinates.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-set-offset"></a><h3>gwy_data_line_set_offset ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_set_offset            (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> offset</code></em>);</pre>
<p>
Sets the offset of a data line origin.
</p>
<p>
Note offsets don't affect any calculation, nor functions like
<a class="link" href="GwyDataLine.html#gwy-data-line-rtoi" title="gwy_data_line_rtoi ()"><code class="function">gwy_data_line_rtoi()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>offset</code></em> :</span></p></td>
<td>New offset value.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-set-real"></a><h3>gwy_data_line_set_real ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_set_real              (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> real</code></em>);</pre>
<p>
Sets the real data line size.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>real</code></em> :</span></p></td>
<td>value to be set</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-set-si-unit-x"></a><h3>gwy_data_line_set_si_unit_x ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_set_si_unit_x         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="type">GwySIUnit</span></a> *si_unit</code></em>);</pre>
<p>
Sets the SI unit corresponding to the lateral (X) dimension of a data
line.
</p>
<p>
It does not assume a reference on <em class="parameter"><code>si_unit</code></em>, instead it adds its own
reference.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>si_unit</code></em> :</span></p></td>
<td>SI unit to be set.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-set-si-unit-y"></a><h3>gwy_data_line_set_si_unit_y ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_set_si_unit_y         (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="./../libgwyddion/libgwyddion/GwySIUnit.html"><span class="type">GwySIUnit</span></a> *si_unit</code></em>);</pre>
<p>
Sets the SI unit corresponding to the "height" (Z) dimension of a data
line.
</p>
<p>
It does not assume a reference on <em class="parameter"><code>si_unit</code></em>, instead it adds its own
reference.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>si_unit</code></em> :</span></p></td>
<td>SI unit to be set.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-set-val"></a><h3>gwy_data_line_set_val ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_set_val               (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> i</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> value</code></em>);</pre>
<p>
Sets the value at given position in a data line.
</p>
<p>
Do not set data with this function inside inner loops, it's slow.  Get raw
data buffer with <a class="link" href="GwyDataLine.html#gwy-data-line-get-data" title="gwy_data_line_get_data ()"><code class="function">gwy_data_line_get_data()</code></a> and write to it directly instead.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>i</code></em> :</span></p></td>
<td>Position in the line (index).</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>Value to set.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-sqrt"></a><h3>gwy_data_line_sqrt ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_sqrt                  (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>);</pre>
<p>
Applies <code class="function">sqrt()</code> to each element in a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-subtract-polynom"></a><h3>gwy_data_line_subtract_polynom ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gwy_data_line_subtract_polynom      (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> n</code></em>,
                                                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *coeffs</code></em>);</pre>
<p>
Subtracts a polynomial from a data line.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>Polynom degree.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>coeffs</code></em> :</span></p></td>
<td>An array of size <em class="parameter"><code>n</code></em>+1 with polynomial coefficients to.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-threshold"></a><h3>gwy_data_line_threshold ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a>                gwy_data_line_threshold             (<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> threshval</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> bottom</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> top</code></em>);</pre>
<p>
Sets all the values to <em class="parameter"><code>bottom</code></em> or <em class="parameter"><code>top</code></em> value
depending on whether the original values are
below or above <em class="parameter"><code>threshold</code></em> value
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>threshval</code></em> :</span></p></td>
<td>Threshold value.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>bottom</code></em> :</span></p></td>
<td>Lower replacement value.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>top</code></em> :</span></p></td>
<td>Upper replacement value.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>total number of values above threshold</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GwyDataLine.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GwyDataLine-data-changed"></a><h3>The <code class="literal">"data-changed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *gwydataline,
                                                        <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>     user_data)        : <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a></pre>
<p>
The ::data-changed signal is never emitted by data line itself.  It
is intended as a means to notify others data line users they should
update themselves.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>gwydataline</code></em> :</span></p></td>
<td>The <a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> which received the signal.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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