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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Initializing PLplot</title><link rel="stylesheet" type="text/css" href="stylesheet.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="index.html" title="Documentation of the PLplot plotting software"><link rel="up" href="simple.html" title="Chapter 2. Simple Use of PLplot"><link rel="prev" href="simple-graph.html" title="Plotting a Simple Graph"><link rel="next" href="scales.html" title="Defining Plot Scales and Axes"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Initializing PLplot</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="simple-graph.html">Prev</a> </td><th width="60%" align="center">Chapter 2. Simple Use of PLplot</th><td width="20%" align="right"> <a accesskey="n" href="scales.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="initializing"></a>Initializing PLplot</h2></div></div></div><p>
Before any actual plotting calls are made, a graphics program must
call <a class="link" href="plinit.html" title="plinit: Initialize PLplot"><code class="function">plinit</code></a>, is the main initialization routine for PLplot. It
sets up all internal data structures necessary for plotting and
initializes the output device driver. If the output device has not
already been specified when <a class="link" href="plinit.html" title="plinit: Initialize PLplot"><code class="function">plinit</code></a> is called, a list of valid
output devices is given and the user is prompted for a choice.
Either the device number or a device keyword is accepted.
</p><p>
There are several routines affecting the initialization that must
be called <span class="emphasis"><em>before</em></span> <a class="link" href="plinit.html" title="plinit: Initialize PLplot"><code class="function">plinit</code></a>, if they are used. The
function <a class="link" href="plsdev.html" title="plsdev: Set the device (keyword) name"><code class="function">plsdev</code></a> allows you to set the device explicitly. The
function <a class="link" href="plsetopt.html" title="plsetopt: Set any command-line option"><code class="function">plsetopt</code></a> allows you to set any command-line option
internally in your code. The function <a class="link" href="plssub.html" title="plssub: Set the number of subpages in x and y"><code class="function">plssub</code></a> may be called to
divide the output device plotting area into several subpages of equal
size, each of which can be used separately. </p><p>
One advances to the next page (or screen) via <a class="link" href="pladv.html" title="pladv: Advance the (sub-)page"><code class="function">pladv</code></a>. If subpages
are used, this can be used to advance to the next subpage or to a
particular subpage.
</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="simple-graph.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="simple.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="scales.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Plotting a Simple Graph </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Defining Plot Scales and Axes</td></tr></table></div></body></html>
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