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<h2><span class="refentrytitle"><a name="libgwyprocess-arithmetic.top_of_page"></a>arithmetic</span></h2>
<p>arithmetic — Arithmetic opetations on data fields</p>
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<div class="refsynopsisdiv">
<a name="libgwyprocess-arithmetic.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <libprocess/gwyprocess.h>
<span class="returnvalue">void</span> <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-field-sum-fields" title="gwy_data_field_sum_fields ()">gwy_data_field_sum_fields</a> (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-field-subtract-fields" title="gwy_data_field_subtract_fields ()">gwy_data_field_subtract_fields</a> (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-field-divide-fields" title="gwy_data_field_divide_fields ()">gwy_data_field_divide_fields</a> (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-field-multiply-fields" title="gwy_data_field_multiply_fields ()">gwy_data_field_multiply_fields</a> (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-field-min-of-fields" title="gwy_data_field_min_of_fields ()">gwy_data_field_min_of_fields</a> (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-field-max-of-fields" title="gwy_data_field_max_of_fields ()">gwy_data_field_max_of_fields</a> (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-field-hypot-of-fields" title="gwy_data_field_hypot_of_fields ()">gwy_data_field_hypot_of_fields</a> (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);
<a class="link" href="libgwyprocess-gwyprocessenums.html#GwyDataCompatibilityFlags" title="enum GwyDataCompatibilityFlags"><span class="returnvalue">GwyDataCompatibilityFlags</span></a> <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-field-check-compatibility" title="gwy_data_field_check_compatibility ()">gwy_data_field_check_compatibility</a>
(<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *data_field1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *data_field2</code></em>,
<em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyDataCompatibilityFlags" title="enum GwyDataCompatibilityFlags"><span class="type">GwyDataCompatibilityFlags</span></a> check</code></em>);
<a class="link" href="libgwyprocess-gwyprocessenums.html#GwyDataCompatibilityFlags" title="enum GwyDataCompatibilityFlags"><span class="returnvalue">GwyDataCompatibilityFlags</span></a> <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-line-check-compatibility" title="gwy_data_line_check_compatibility ()">gwy_data_line_check_compatibility</a>
(<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line2</code></em>,
<em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyDataCompatibilityFlags" title="enum GwyDataCompatibilityFlags"><span class="type">GwyDataCompatibilityFlags</span></a> check</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="libgwyprocess-arithmetic.description"></a><h2>Description</h2>
<p>
Data arithmetic functions perform simple operations combining several data
fields. Their sizes have to be size-compatible, i.e.
gwy_data_field_check_compatibility(operand1, operand2, GWY_DATA_COMPATIBILITY_RES)
must pass and the same must hold for the data field to store the result to.
</p>
<p>
Functions <a class="link" href="libgwyprocess-arithmetic.html#gwy-data-field-check-compatibility" title="gwy_data_field_check_compatibility ()"><code class="function">gwy_data_field_check_compatibility()</code></a> and
<a class="link" href="libgwyprocess-arithmetic.html#gwy-data-line-check-compatibility" title="gwy_data_line_check_compatibility ()"><code class="function">gwy_data_line_check_compatibility()</code></a> simplify testing compatibility of data
fields and lines, respectively.
</p>
</div>
<div class="refsect1">
<a name="libgwyprocess-arithmetic.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="gwy-data-field-sum-fields"></a><h3>gwy_data_field_sum_fields ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_field_sum_fields (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);</pre>
<p>
Sums two data fields.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td>
<td>A data field to put the result to. May be one of <em class="parameter"><code>operand1</code></em>,
<em class="parameter"><code>operand2</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand1</code></em> :</span></p></td>
<td>First data field operand.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand2</code></em> :</span></p></td>
<td>Second data field operand.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-field-subtract-fields"></a><h3>gwy_data_field_subtract_fields ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_field_subtract_fields (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);</pre>
<p>
Subtracts one data field from another.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td>
<td>A data field to put the result to. May be one of <em class="parameter"><code>operand1</code></em>,
<em class="parameter"><code>operand2</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand1</code></em> :</span></p></td>
<td>First data field operand.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand2</code></em> :</span></p></td>
<td>Second data field operand.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-field-divide-fields"></a><h3>gwy_data_field_divide_fields ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_field_divide_fields (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);</pre>
<p>
Divides one data field with another.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td>
<td>A data field to put the result to. May be one of <em class="parameter"><code>operand1</code></em>,
<em class="parameter"><code>operand2</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand1</code></em> :</span></p></td>
<td>First data field operand.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand2</code></em> :</span></p></td>
<td>Second data field operand.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-field-multiply-fields"></a><h3>gwy_data_field_multiply_fields ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_field_multiply_fields (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);</pre>
<p>
Multiplies two data fields.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td>
<td>A data field to put the result to. May be one of <em class="parameter"><code>operand1</code></em>,
<em class="parameter"><code>operand2</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand1</code></em> :</span></p></td>
<td>First data field operand.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand2</code></em> :</span></p></td>
<td>Second data field operand.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-field-min-of-fields"></a><h3>gwy_data_field_min_of_fields ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_field_min_of_fields (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);</pre>
<p>
Finds point-wise maxima of two data fields.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td>
<td>A data field to put the result to. May be one of <em class="parameter"><code>operand1</code></em>,
<em class="parameter"><code>operand2</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand1</code></em> :</span></p></td>
<td>First data field operand.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand2</code></em> :</span></p></td>
<td>Second data field operand.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-field-max-of-fields"></a><h3>gwy_data_field_max_of_fields ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_field_max_of_fields (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);</pre>
<p>
Finds point-wise minima of two data fields.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td>
<td>A data field to put the result to. May be one of <em class="parameter"><code>operand1</code></em>,
<em class="parameter"><code>operand2</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand1</code></em> :</span></p></td>
<td>First data field operand.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand2</code></em> :</span></p></td>
<td>Second data field operand.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-field-hypot-of-fields"></a><h3>gwy_data_field_hypot_of_fields ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gwy_data_field_hypot_of_fields (<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *result</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *operand2</code></em>);</pre>
<p>
Finds point-wise hypotenuse of two data fields.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td>
<td>A data field to put the result to. May be one of <em class="parameter"><code>operand1</code></em>,
<em class="parameter"><code>operand2</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand1</code></em> :</span></p></td>
<td>First data field operand.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>operand2</code></em> :</span></p></td>
<td>Second data field operand.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.31</p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-field-check-compatibility"></a><h3>gwy_data_field_check_compatibility ()</h3>
<pre class="programlisting"><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyDataCompatibilityFlags" title="enum GwyDataCompatibilityFlags"><span class="returnvalue">GwyDataCompatibilityFlags</span></a> gwy_data_field_check_compatibility
(<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *data_field1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataField.html" title="GwyDataField"><span class="type">GwyDataField</span></a> *data_field2</code></em>,
<em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyDataCompatibilityFlags" title="enum GwyDataCompatibilityFlags"><span class="type">GwyDataCompatibilityFlags</span></a> check</code></em>);</pre>
<p>
Checks whether two data fields are compatible.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_field1</code></em> :</span></p></td>
<td>A data field.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_field2</code></em> :</span></p></td>
<td>Another data field.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>check</code></em> :</span></p></td>
<td>The compatibility tests to perform.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Zero if all tested properties are compatible. Flags corresponding
to failed tests if data fields are not compatible.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-line-check-compatibility"></a><h3>gwy_data_line_check_compatibility ()</h3>
<pre class="programlisting"><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyDataCompatibilityFlags" title="enum GwyDataCompatibilityFlags"><span class="returnvalue">GwyDataCompatibilityFlags</span></a> gwy_data_line_check_compatibility
(<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line1</code></em>,
<em class="parameter"><code><a class="link" href="GwyDataLine.html" title="GwyDataLine"><span class="type">GwyDataLine</span></a> *data_line2</code></em>,
<em class="parameter"><code><a class="link" href="libgwyprocess-gwyprocessenums.html#GwyDataCompatibilityFlags" title="enum GwyDataCompatibilityFlags"><span class="type">GwyDataCompatibilityFlags</span></a> check</code></em>);</pre>
<p>
Checks whether two data lines are compatible.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line1</code></em> :</span></p></td>
<td>A data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data_line2</code></em> :</span></p></td>
<td>Another data line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>check</code></em> :</span></p></td>
<td>The compatibility tests to perform.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Zero if all tested properties are compatible. Flags corresponding
to failed tests if data lines are not compatible.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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