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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>2.4. Different Size Images and Titles</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="starting.html" title="Chapter 2. Getting Started with PHPlot" /><link rel="prev" href="starting-simple.html" title="2.3. A Simple Graph" /><link rel="next" href="start-multiple.html" title="2.5. Multiple Lines Per Graph" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">2.4. Different Size Images and Titles</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="starting-simple.html">Prev</a> </td><th width="60%" align="center">Chapter 2. Getting Started with PHPlot</th><td width="20%" align="right"> <a accesskey="n" href="start-multiple.html">Next</a></td></tr></table><hr /></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="starting-more"></a>2.4. Different Size Images and Titles</h2></div></div></div><p>
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Let's say we want our plot to be bigger, 800 pixels wide and 600 pixels high.
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So instead of having the line
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</p><pre class="programlisting">$plot = new PHPlot;
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</pre><p>
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</p><p>
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We replace it with
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</p><pre class="programlisting">$plot = new PHPlot(800,600);
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</pre><p>
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and you have specified the size in pixels of the image to be created.
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</p><p>
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A couple of things to note:
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</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
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The default is not to use TrueType fonts.
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</p></li><li class="listitem"><p>
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Since there was only one graph on the image, we didn't have to
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use PrintImage. DrawGraph took care of it for us.
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</p></li><li class="listitem"><p>
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We did not specify the data type. If you do not specify the data
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type, PHPlot assumes <code class="literal">text-data</code>.
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</p></li><li class="listitem"><p>
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We did not specify the file type (GIF, PNG, JPEG, ...).
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PHPlot 5.0 (and newer) makes PNG images by default.
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</p></li><li class="listitem"><p>
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The data is passed in as an array of arrays. This may seem awkward
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now, but as we add functionality this will be beneficial.
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</p></li></ul></div><p>
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</p><p>
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OK, now we're ready to add some customization to the plot. Let's change
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the size, the title and the X/Y axis labels. All we need to do is use
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additional methods of the <code class="literal">$plot</code> object before
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printing the image. Here is the complete result:
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</p><pre class="programlisting"><?php
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//Include the code
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require_once 'phplot.php';
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//create a PHPlot object with 800x600 pixel image
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$plot = new PHPlot(800,600);
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//Define some data
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$example_data = array(
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array('a',3),
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array('b',5),
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array('c',7),
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array('d',8),
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array('e',2),
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array('f',6),
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array('g',7)
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);
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$plot->SetDataValues($example_data);
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//Set titles
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$plot->SetTitle("A Simple Plot\nMade with PHPlot");
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$plot->SetXTitle('X Data');
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$plot->SetYTitle('Y Data');
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//Turn off X axis ticks and labels because they get in the way:
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$plot->SetXTickLabelPos('none');
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$plot->SetXTickPos('none');
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//Draw it
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$plot->DrawGraph();
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</pre><p>
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</p><p>
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And that's it! What we get is the following graph:
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</p><div class="informalfigure"><div class="mediaobject"><img src="examples/qs2.png" alt="Line graph with titles and labels" /></div></div><p>
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</p><p>
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Note that the newline character "\n" separates multiple lines
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in titles, and you must use double quotes around the title string for PHP
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to recognize the newline.
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</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="starting-simple.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="starting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="start-multiple.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">2.3. 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"> 2.5. Multiple Lines Per Graph</td></tr></table></div></body></html>
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