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<title>ploticus: system variables</title>
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<br>
<br>
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<td>
<table cellpadding=2 width=550><tr>
<td><br><h2>System variables</h2></td>
<td align=right>
<small>
<a href="../doc/Welcome.html"><img src="../doc/ploticus.gif" border=0></a><br>
<a href="../doc/Welcome.html">Welcome</a>
<a href="../gallery/index.html">Gallery</a>
<a href="../doc/Contents.html">Handbook</a>
<td></tr></table>
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<td>
<br>
<br>
<title>Manual page for System_variables(PL)</title>
</head>
<body>
<h2>System Variables</h2>
Ploticus reserves the right to assign certain variables, described below.<tt> </tt>
These variables may be accessed by user scripts as needed.<tt> </tt>
<p>
In order to reference a variable immediately after the proc that set the variable,
<a href="scripts.html">
#endproc
</a>
must be used beforehand.<tt> </tt>
<br><br><br>
<p>
<b>AREALEFT AREARIGHT AREABOTTOM AREATOP</b>
<dl>
<dt><dd><p>
Set by <b>proc areadef</b> to the locations of the current plot area edges in
<a href="attributetypes.html#positionunits">
absolute units.
</a>
.<tt> </tt>
</dl>
<p>
<b>XMIN XMAX YMIN YMAX</b>
<dl>
<dt><dd><p>
Set by <b>proc areadef</b> to the limits in scaled units, of the plotting area.<tt> </tt>
</dl>
<p>
<b>DATAXMIN</b>, <b>DATAXMAX</b>
<dl>
<dt><dd><p>
The minima and maxima of the data field when xautorange is used.<tt> </tt>
Different from XMIN and XMAX in that these do not include any margin.<tt> </tt>
</dl>
<p>
<b>DATAYMIN</b>, <b>DATAYMAX</b>
<dl>
<dt><dd><p>
The minima and maxima of the data field when yautorange is used.<tt> </tt>
Different from YMIN and YMAX in that these do not include any margin.<tt> </tt>
</dl>
<p>
<b>CM_UNITS</b>
<dl>
<dt><dd><p>
if user has opted to use centimeters as absolute units, this will contain 1,
otherwise 0.<tt> </tt>
</dl>
<p>
<b>DEVICE</b>
<dl>
<dt><dd><p>
the output display format, one of: <tt>png gif eps ps bwps x11 jpeg wbmp</tt>
</dl>
<p>
<p>
<b>NFIELDS</b>
<dl>
<dt><dd><p>
the number of fields per record in the current data set.<tt> </tt>
</dl>
<p>
<b>NRECORDS</b>
<dl>
<dt><dd><p>
the number of records in the current data set.<tt> </tt>
</dl>
<p>
<b>NVALUES</b>
<dl>
<dt><dd><p>
the number of in-range plottable points rendered by the most recent
<b>proc scatterplot</b> or <b>proc rangebar</b>.
May be used in the proc scatterplot legend label.<tt> </tt>
</dl>
<p>
<b>RANGEBARMEDIAN RANGEBARMIN RANGEBARMAX</b>
<dl>
<dt><dd><p>
the median, min, and max value of the most recently drawn rangebar,
in scaled units.<tt> </tt>
</dl>
<p>
<b>TOTALS</b>
<dl>
<dt><dd><p>
Set by <b>proc processdata</b> when action is <tt>totals</tt>, it holds
either a single total value, or a comma-delimited list of total values.<tt> </tt>
</dl>
<p>
<b>BREAKFIELD1 ..</b>
<dl>
<dt><dd><p>
Set by <b>proc processdata</b> when action is <tt>breaks</tt>, it holds
the contents of the break field(s), before reaching the breakpoint.<tt> </tt>
</dl>
<p>
<b>XSTART</b>, <b>YSTART</b>
<dl>
<dt><dd><p>
X and Y location where the most recent <b>proc lineplot</b> curve began, in scaled units.<tt> </tt>
</dl>
<p>
<b>XFINAL</b>, <b>YFINAL</b>
<dl>
<dt><dd><p>
X and Y location where the most recent <b>proc lineplot</b> curve ended, in scaled units.<tt> </tt>
<br>
<br>
</td></tr>
<td align=right>
<a href="Welcome.html">
<img src="../doc/ploticus.gif" border=0></a><br><small>data display engine <br>
<a href="../doc/Copyright.html">Copyright Steve Grubb</a>
<br>
<br>
<center>
<img src="../gallery/all.gif">
</center>
</td></tr>
</table>
</dl>
<p><hr>
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