/usr/share/doc/stilts/sun256/layer-xyellipse.html is in stilts-doc 3.1.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 | <html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="sun-style.css">
<title>xyellipse</title>
</head>
<body>
<hr>
<a href="layer-xycorr.html">Next</a> <a href="layer-xyerror.html">Previous</a> <a href="LayerType.html">Up</a> <a href="index.html">Contents</a> <br> <b>Next: </b><a href="layer-xycorr.html">xycorr</a><br>
<b>Up: </b><a href="LayerType.html">Layer Types</a><br>
<b>Previous: </b><a href="layer-xyerror.html">xyerror</a><br>
<hr>
<h4><a name="layer-xyellipse">8.3.6 <code>xyellipse</code></a></h4>
<p>Plots an ellipse (or rectangle, triangle,
or other similar figure)
defined by two principal radii and
an optional angle of rotation,
the so-called position angle.
This angle, if specified, is in degrees and
gives the angle counterclockwise from the horizontal axis
to the first principal radius.
</p>
<p>In some cases the supplied data values
give the actual extents in data coordinates
for the plotted ellipses
but sometimes the data is on a different scale
or in different units to the positional coordinates.
As a convenience for this case, the plotter can optionally
scale the magnitudes of all the ellipses
to make them a reasonable size on the plot,
so by default the largest ones are a few tens of pixels long.
This auto-scaling is turned off by default,
but it can be activated with the
<code>autoscale</code>
option.
Whether autoscaling is on or off, the
<code>scale</code>
option can be used to apply a fixed scaling factor.
</p>
<p>
<strong>Usage Overview:</strong>
<pre>
layerN=xyellipse ellipseN=ellipse|crosshair_ellipse|... scaleN=<factor>
autoscaleN=true|false
shadingN=auto|flat|translucent|transparent|density|aux|weighted <shade-paramsN>
xN=<num-expr> yN=<num-expr> raN=<num-expr> rbN=<num-expr>
posangN=<deg-expr> inN=<table> ifmtN=<in-format>
istreamN=true|false icmdN=<cmds>
</pre>
</p>
<p>All the parameters listed here
affect only the relevant layer,
identified by the suffix
<code>N</code>.
</p>
<p>
<strong>Example:</strong>
</p>
<div align="center"><img src="plot2-layer-xyellipse.png" alt="" align="middle"></div>
<p><pre> stilts plot2plane <strong>in=mgc_ok.fits</strong> <strong>x=mgc_alpha_j2000</strong> <strong>y=mgc_delta_j2000</strong>
<strong>ra=bulge_re/3600.</strong> <strong>rb=bulge_re*bulge_e/3600.</strong> <strong>posang=bulge_pa</strong>
<strong>autoscale=false</strong> <strong>scale=10</strong> <strong>color=blue</strong>
<strong>layer1=xyellipse</strong> <strong>ellipse1=filled_ellipse</strong> <strong>shading1=transparent</strong> <strong>opaque1=4</strong>
<strong>layer2=xyellipse</strong> <strong>ellipse2=crosshair_ellipse</strong>
aspect=1 xmin=181.3 xmax=181.9</pre></p>
<p>
<dl>
<dt><strong><code>autoscaleN = true|false</code> <em>(Boolean)</em></strong></dt>
<dd>Determines whether the default size of variable-sized
markers like vectors and ellipses are automatically
scaled to have a sensible size.
If true, then the sizes of all the plotted markers
are examined, and some dynamically calculated factor is
applied to them all to make them a sensible size
(by default, the largest ones will be a few tens of pixels).
If false, the sizes will be the actual input values
interpreted in data coordinates.
<p>If auto-scaling is on, then markers will keep
approximately the same screen size during zoom operations;
if it's off, they will keep the same size
in data coordinates.
</p>
<p>Marker size is also affected by the
<code>scale</code> parameter.
</p>
<p>[Default: <code>false</code>]
</p>
</dd>
<dt><strong><code>ellipseN = ellipse|crosshair_ellipse|...</code> <em>(<a href="http://andromeda.star.bris.ac.uk/starjavadocs/uk/ac/starlink/ttools/plot/ErrorRenderer.html">ErrorRenderer</a>)</em></strong></dt>
<dd>How ellipses are represented.
<p>The available options are:
<ul>
<li><code>ellipse</code></li>
<li><code>crosshair_ellipse</code></li>
<li><code>filled_ellipse</code></li>
<li><code>rectangle</code></li>
<li><code>crosshair_rectangle</code></li>
<li><code>filled_rectangle</code></li>
<li><code>open_triangle</code></li>
<li><code>filled_triangle</code></li>
<li><code>lines</code></li>
<li><code>capped_lines</code></li>
<li><code>arrows</code></li>
</ul>
</p>
<p>[Default: <code>ellipse</code>]
</p>
</dd>
<dt><strong><code>icmdN = <cmds></code> <em>(<a href="http://andromeda.star.bris.ac.uk/starjavadocs/uk/ac/starlink/ttools/filter/ProcessingStep.html">ProcessingStep[]</a>)</em></strong></dt>
<dd>Specifies processing to be performed on
the layer N input table as specified by parameter <code>inN</code>.
The value of this parameter is one or more of the filter
commands described in <a href="filterSteps.html">Section 6.1</a>.
If more than one is given, they must be separated by
semicolon characters (";").
This parameter can be repeated multiple times on the same
command line to build up a list of processing steps.
The sequence of commands given in this way
defines the processing pipeline which is performed on the table.
<p>Commands may alteratively be supplied in an external file,
by using the indirection character '@'.
Thus a value of "<code>@filename</code>"
causes the file <code>filename</code> to be read for a list
of filter commands to execute. The commands in the file
may be separated by newline characters and/or semicolons.
</p>
</dd>
<dt><strong><code>ifmtN = <in-format></code> <em>(String)</em></strong></dt>
<dd>Specifies the format of the input table as specified by parameter <code>inN</code>.
The known formats are listed in <a href="inFormats.html">Section 5.2.1</a>.
This flag can be used if you know what format your
table is in.
If it has the special value
<code>(auto)</code> (the default),
then an attempt will be
made to detect the format of the table automatically.
This cannot always be done correctly however, in which case
the program will exit with an error explaining which
formats were attempted.
<p>[Default: <code>(auto)</code>]
</p>
</dd>
<dt><strong><code>inN = <table></code> <em>(<a href="http://www.starlink.ac.uk/stil/javadocs/uk/ac/starlink/table/StarTable.html">StarTable</a>)</em></strong></dt>
<dd>The location of the input table.
This may take one of the following forms:
<ul>
<li>A filename.</li>
<li>A URL.</li>
<li>The special value "<code>-</code>",
meaning standard input.
In this case the input format must be given explicitly
using the <code>ifmtN</code>
parameter.
Note that not all formats can be streamed in this way.
</li>
<li>A system command line with
either a "<code><</code>" character at the start,
or a "<code>|</code>" character at the end
("<code><syscmd</code>" or
"<code>syscmd|</code>").
This executes the given pipeline and reads from its
standard output.
This will probably only work on unix-like systems.
</li>
</ul>
In any case, compressed data in one of the supported compression
formats (gzip, Unix compress or bzip2) will be decompressed
transparently.
</dd>
<dt><strong><code>istreamN = true|false</code> <em>(Boolean)</em></strong></dt>
<dd>If set true, the input table
specified by the <code>inN</code> parameter
will be read as a stream.
It is necessary to give the
<code>ifmtN</code> parameter
in this case.
Depending on the required operations and processing mode,
this may cause the read to fail (sometimes it is necessary
to read the table more than once).
It is not normally necessary to set this flag;
in most cases the data will be streamed automatically
if that is the best thing to do.
However it can sometimes result in less resource usage when
processing large files in certain formats (such as VOTable).
<p>[Default: <code>false</code>]
</p>
</dd>
<dt><strong><code>posangN = <deg-expr></code> <em>(String)</em></strong></dt>
<dd>Orientation of the ellipse.
The value is the angle in degrees
from the X axis towards the Y axis
of the first principal axis of the ellipse.
<p>The value is a numeric algebraic expression based on column names
as described in <a href="jel.html">Section 10</a>.
</p>
</dd>
<dt><strong><code>raN = <num-expr></code> <em>(String)</em></strong></dt>
<dd>Ellipse first principal radius.
<p>The value is a numeric algebraic expression based on column names
as described in <a href="jel.html">Section 10</a>.
</p>
</dd>
<dt><strong><code>rbN = <num-expr></code> <em>(String)</em></strong></dt>
<dd>Ellipse second principal radius.
If this value is blank, the two radii will be assumed equal,
i.e. the ellipses will be circles.
<p>The value is a numeric algebraic expression based on column names
as described in <a href="jel.html">Section 10</a>.
</p>
</dd>
<dt><strong><code>scaleN = <factor></code> <em>(Double)</em></strong></dt>
<dd>Affects the size of variable-sized markers
like vectors and ellipses.
The default value is 1, smaller or larger values
multiply the visible sizes accordingly.
<p>[Default: <code>1</code>]
</p>
</dd>
<dt><strong><code>shadingN = auto|flat|translucent|transparent|density|aux|weighted <shade-paramsN></code> <em>(<a href="http://andromeda.star.bris.ac.uk/starjavadocs/uk/ac/starlink/ttools/plot2/layer/ShapeMode.html">ShapeMode</a>)</em></strong></dt>
<dd>Determines how plotted objects in layer N
are coloured.
This may be influenced by how many objects are plotted
over each other as well as the values of other parameters.
Available options (<a href="ShapeMode.html">Section 8.4</a>) are:
<ul>
<li><code><a href="shading-auto.html">auto</a></code></li>
<li><code><a href="shading-flat.html">flat</a></code></li>
<li><code><a href="shading-translucent.html">translucent</a></code></li>
<li><code><a href="shading-transparent.html">transparent</a></code></li>
<li><code><a href="shading-density.html">density</a></code></li>
<li><code><a href="shading-aux.html">aux</a></code></li>
<li><code><a href="shading-weighted.html">weighted</a></code></li>
</ul>
Each of these options comes with its own set of parameters
to specify the details of how colouring is done.
<p>[Default: <code>auto</code>]
</p>
</dd>
<dt><strong><code>xN = <num-expr></code> <em>(String)</em></strong></dt>
<dd>Horizontal coordinate.
<p>The value is a numeric algebraic expression based on column names
as described in <a href="jel.html">Section 10</a>.
</p>
</dd>
<dt><strong><code>yN = <num-expr></code> <em>(String)</em></strong></dt>
<dd>Vertical coordinate.
<p>The value is a numeric algebraic expression based on column names
as described in <a href="jel.html">Section 10</a>.
</p>
</dd>
</dl>
</p>
<hr><a href="layer-xycorr.html">Next</a> <a href="layer-xyerror.html">Previous</a> <a href="LayerType.html">Up</a> <a href="index.html">Contents</a> <br> <b>Next: </b><a href="layer-xycorr.html">xycorr</a><br>
<b>Up: </b><a href="LayerType.html">Layer Types</a><br>
<b>Previous: </b><a href="layer-xyerror.html">xyerror</a><br>
<hr><i>STILTS - Starlink Tables Infrastructure Library Tool Set<br>Starlink User Note256<br>STILTS web page:
<a href="http://www.starlink.ac.uk/stilts/">http://www.starlink.ac.uk/stilts/</a><br>Author email:
<a href="mailto:m.b.taylor@bristol.ac.uk">m.b.taylor@bristol.ac.uk</a><br>Mailing list:
<a href="mailto:topcat-user@jiscmail.ac.uk">topcat-user@jiscmail.ac.uk</a><br></i></body>
</html>
|