d72ac078
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Ajout graphe V1.1
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Chapter 22. Matrix graphs</title><link rel="stylesheet" type="text/css" href="manual.css"><meta name="generator" content="DocBook XSL Stylesheets V1.76.0"><link rel="home" href="index.html" title="JpGraph Manual"><link rel="up" href="pt05.html" title="Part V. Additional graph types available in the professional version"></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">Chapter 22. Matrix graphs</th></tr><tr><td width="20%" align="left"> </td><th width="60%" align="center">Part V. Additional graph types available in the professional version</th><td width="20%" align="right"> </td></tr></table><hr></div><div class="chapter" title="Chapter 22. Matrix graphs"><div class="titlepage"><div><div><h2 class="title"><a name="chapter.matrix-graphs"></a>Chapter 22. Matrix graphs</h2></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="ch22.html#id2591500">22.1. Introduction</a></span></dt><dd><dl><dt><span class="sect2"><a href="ch22.html#id2591636">22.1.1. Features of the matrix plots</a></span></dt></dl></dd><dt><span class="sect1"><a href="ch22s02.html">22.2. Creating and formatting a basic matrix graph</a></span></dt><dt><span class="sect1"><a href="ch22s03.html">22.3. Mesh interpolating of input data</a></span></dt><dt><span class="sect1"><a href="ch22s04.html">22.4. Formatting the matrix plot</a></span></dt><dd><dl><dt><span class="sect2"><a href="ch22s04.html#sec.matrix-color-maps">22.4.1. Color maps</a></span></dt><dt><span class="sect2"><a href="ch22s04.html#id2592595">22.4.2. Changing the module type (rectangle vs. circle)</a></span></dt><dt><span class="sect2"><a href="ch22s04.html#id2592689">22.4.3. Adjusting the alpha blending of the plots</a></span></dt><dt><span class="sect2"><a href="ch22s04.html#id2592859">22.4.4. Specifying the size</a></span></dt><dt><span class="sect2"><a href="ch22s04.html#id2592997">22.4.5. Specifying the position of the plot on the graph</a></span></dt><dt><span class="sect2"><a href="ch22s04.html#id2593044">22.4.6. Adjusting the legend</a></span></dt><dt><span class="sect2"><a href="ch22s04.html#id2593243">22.4.7. Adding row and column legends</a></span></dt></dl></dd><dt><span class="sect1"><a href="ch22s05.html">22.5. Adding icon and text objects to the graph</a></span></dt><dd><dl><dt><span class="sect2"><a href="ch22s05.html#id2593540">22.5.1. Adding a text object</a></span></dt><dt><span class="sect2"><a href="ch22s05.html#id2593642">22.5.2. Adding icons to the graph</a></span></dt><dt><span class="sect2"><a href="ch22s05.html#id2593758">22.5.3. Adding background images</a></span></dt></dl></dd><dt><span class="sect1"><a href="ch22s06.html">22.6. Adding marker lines to the matrix plot</a></span></dt><dt><span class="sect1"><a href="ch22s07.html">22.7. Using layout classes to position matrix plots</a></span></dt><dt><span class="sect1"><a href="ch22s08.html">22.8. Built in color maps</a></span></dt><dd><dl><dt><span class="sect2"><a href="ch22s08.html#id2594164">22.8.1. Standard maps</a></span></dt><dt><span class="sect2"><a href="ch22s08.html#id2594199">22.8.2. Normalized center</a></span></dt><dt><span class="sect2"><a href="ch22s08.html#id2594189">22.8.3. Continues map</a></span></dt></dl></dd><dt><span class="sect1"><a href="ch22s09.html">22.9. Using CSIM with matrix plots</a></span></dt><dt><span class="sect1"><a href="ch22s10.html">22.10. Matrix graph examples</a></span></dt><dd><dl><dt><span class="sect2"><a href="ch22s10.html#id2594387">22.10.1. Example 1</a></span></dt><dt><span class="sect2"><a href="ch22s10.html#id2594395">22.10.2. Example 2</a></span></dt><dt><span class="sect2"><a href="ch22s10.html#id2594404">22.10.3. Example 3</a></span></dt><dt><span class="sect2"><a href="ch22s10.html#id2594415">22.10.4. Example 4</a></span></dt></dl></dd></dl></div>
<div class="sect1" title="Introduction"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2591500"></a>Introduction</h2></div></div></div>
<div class="note" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3>
<p>This module is only available in the pro-version of the library.</p>
</div>
<p>Matrix graphs are used to visualize the content of a rectangular matrix. Each entry in
the matrix is mapped to a specific color which are then displayed in a rectangular plot
corresponding to the size of the input matrix. The size of each module (corresponding to
a matrix entry) is user customizable. There are two types of possible modules; circular
and rectangular shape.</p>
<p>In order to achieve high quality rendering when circles are used the matrix module
makes use of an optional (user settable) super-sampling to achieve an anti-alias effect
to take the edge of the filled circles.</p>
<p>The color assignment to each value is controlled by the selected color map. The
library first establish the min and max value in the matrix and then equates the min
value with the "lower" end of the specified color map and the max value with the
"higher" end of the color map. All values in between is linearly interpolated to a have
a color between the "low" and "high" end in relation to the value (which are guaranteed
to be between the min and max value previously established). There are several
pre-defined color maps available as well as completely user configurable color maps. </p>
<p>The (optional) legend shows the range associated to each color in the corresponding
plot.</p>
<p>
</p><div class="tip" title="Tip" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Tip</h3>
<p>The library supports mesh interpolation. Mesh interpolation which by itself
doesn't produce any new data but can help produce smoother plots by creating
"false" interpolated values in between the original entries in the matrix. This
is similar to the Matlab (tm) command <span class="command"><strong>interp2</strong></span>
</p>
</div><p>
</p>
<p>The overall structure and capabilities of matrix graphs follows that of other graphs
in the library, e.g. Windrose plots, in that a graph can have multiple plots, title,
footers, texts, icons, image backgrounds etc. <a class="xref" href="ch22.html#fig.matrix_introex" title="Figure 22.1. A medium complex example to shows some capabilities of matrix plots (matrix_introex.php)">Figure 22.1. A medium complex example to shows some capabilities of matrix plots <code class="uri"><a class="uri" href="example_src/matrix_introex.html" target="_top">(<code class="filename">matrix_introex.php</code>)</a></code> </a> shows a medium complex example of two matrix
plots in a matrix graphs which uses both a background image, icon (the logo in the top
left corner), timing of the graph and free positioned text. We have also used a small
degree of alpha blending in the plots just to let the background "shine" through a
little bit. The two plots shows the same data but uses different color maps.</p>
<p>
</p><div class="figure"><a name="fig.matrix_introex"></a><p class="title"><b>Figure 22.1. A medium complex example to shows some capabilities of matrix plots <code class="uri"><a class="uri" href="example_src/matrix_introex.html" target="_top">(<code class="filename">matrix_introex.php</code>)</a></code> </b></p><div class="figure-contents"> <span class="inlinemediaobject"><img src="images/matrix_introex.png" alt="A medium complex example to shows some capabilities of matrix plots (matrix_introex.php)"></span> </div></div><p><br class="figure-break">
</p>
<p>The library offers an extensive range of formatting for the appearance of the plot
when it comes to adjusting exactly how the colors are used. There are several built in
color maps as well as the possibility to specify manual color maps and adjusting the
contrast (scale range) of the plot.</p>
<div class="sect2" title="Features of the matrix plots"><div class="titlepage"><div><div><h3 class="title"><a name="id2591636"></a>Features of the matrix plots</h3></div></div></div>
<p>
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
<p>Both manual and automatic scale range setting</p>
</li><li class="listitem">
<p>Customizable legend position and layout</p>
</li><li class="listitem">
<p>Row and column legends (edge labels)</p>
</li><li class="listitem">
<p>Several built in color maps (22)</p>
</li><li class="listitem">
<p>Option for manual specified color maps</p>
</li><li class="listitem">
<p>Adjustable color contrast</p>
</li><li class="listitem">
<p>Layout classes to position multiple plots in the sam graph</p>
</li><li class="listitem">
<p>Both circular and rectangular module type</p>
</li><li class="listitem">
<p>Mesh interpolation of input data</p>
</li><li class="listitem">
<p>Flexible sizing of matrix plots both manual, automatic and a mix of
them</p>
</li><li class="listitem">
<p>Alpha blending support for matrix plot</p>
</li><li class="listitem">
<p>All the usual graph support for background images, text objects and
icons</p>
</li></ul></div><p>
</p>
</div>
</div>
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