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<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /><title>Chapter 5. PHPlot Examples</title><link rel="stylesheet" type="text/css" href="phplotdoc.css" /><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><link rel="home" href="index.html" title="PHPlot Reference Manual" /><link rel="up" href="part1.html" title="Part I. PHPlot Programming" /><link rel="prev" href="adv-imgmap.html" title="4.10. Image Maps for Plot Data" /><link rel="next" href="ex-lines2.html" title="5.2. Example - Line Plot: Functions" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 5. PHPlot Examples</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="adv-imgmap.html">Prev</a> </td><th width="60%" align="center">Part I. PHPlot Programming</th><td width="20%" align="right"> <a accesskey="n" href="ex-lines2.html">Next</a></td></tr></table><hr /></div><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a id="examples"></a>Chapter 5. PHPlot Examples</h2></div></div></div><div class="abstract"><p class="title"><strong></strong></p><p>
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This chapter contains examples of plots produced with PHPlot.
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</p></div><p>
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Each of the following PHPlot examples shows an image, followed by the PHP
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script which produced that image. Each script is self-contained (needing
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only PHPlot), so you can copy it from this manual and run it with PHP to
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produce the image.
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Note that some of the scripts may require the latest version of PHPlot.
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</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>
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The PHP CLI (command line interface), used to generate the examples here,
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never outputs HTTP headers. So it isn't necessary to use
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<a class="xref" href="SetIsInline.html" title="SetIsInline"><span class="refentrytitle">SetIsInline</span></a> to suppress headers when using the CLI.
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This is a useful method you can use to debug and test your own PHPlot scripts
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without having to modify them for stand-alone use.
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Also, by using the CLI instead of a web server and browser, you can more
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readily see any error messages.
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Run your PHPlot scripts with the PHP CLI like this (using the
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<a class="ulink" href="http://www.imagemagick.org/" target="_top">ImageMagick</a>
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display program to view the results):
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</p><pre class="screen">$ php myscript.php > output.png
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$ display output.png
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</pre><p>
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</p><p>
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<span class="application">ImageMagick</span> is available for several operating systems.
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There are many other image viewers for Linux and Linux-like systems,
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including <span class="application">qiv</span> and <span class="application">geeqie</span>.
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</p></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="ex-lines1"></a>5.1. Example - Line Plot</h2></div></div></div><p>
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This is a simple line plot with a single data set. Data type 'data-data'
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is used to include the X values (the years) in the data points.
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</p><div class="example"><a id="example-lines1"></a><p class="title"><strong>Example 5.1. Line Plot</strong></p><div class="example-contents"><div class="informalfigure"><div class="mediaobject"><img src="examples/lines1.png" alt="Line Plot Example" /></div></div><pre class="programlisting"><?php
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# PHPlot Example: Simple line graph
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require_once 'phplot.php';
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$data = array(
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array('', 1800, 5), array('', 1810, 7), array('', 1820, 10),
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array('', 1830, 13), array('', 1840, 17), array('', 1850, 23),
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array('', 1860, 31), array('', 1870, 39), array('', 1880, 50),
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array('', 1890, 63), array('', 1900, 76), array('', 1910, 92),
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array('', 1920, 106), array('', 1930, 123), array('', 1940, 132),
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array('', 1950, 151), array('', 1960, 179), array('', 1970, 203),
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array('', 1980, 227), array('', 1990, 249), array('', 2000, 281),
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);
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$plot = new PHPlot(800, 600);
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$plot->SetImageBorderType('plain');
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$plot->SetPlotType('lines');
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$plot->SetDataType('data-data');
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$plot->SetDataValues($data);
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# Main plot title:
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$plot->SetTitle('US Population, in millions');
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# Make sure Y axis starts at 0:
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$plot->SetPlotAreaWorld(NULL, 0, NULL, NULL);
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$plot->DrawGraph();
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</pre></div></div><br class="example-break" /></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="adv-imgmap.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="part1.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ex-lines2.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">4.10. Image Maps for Plot Data </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 5.2. Example - Line Plot: Functions</td></tr></table></div></body></html>
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