<!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=utf-8" />
<title>pylab_examples example code: polar_demo.py — Matplotlib v1.1.1 documentation</title>
<link rel="stylesheet" href="../../_static/mpl.css" type="text/css" />
<link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />
<script type="text/javascript">
var DOCUMENTATION_OPTIONS = {
URL_ROOT: '../../',
VERSION: '1.1.1',
COLLAPSE_INDEX: false,
FILE_SUFFIX: '.html',
HAS_SOURCE: true
};
</script>
<script type="text/javascript" src="../../_static/jquery.js"></script>
<script type="text/javascript" src="../../_static/underscore.js"></script>
<script type="text/javascript" src="../../_static/doctools.js"></script>
<link rel="search" type="application/opensearchdescription+xml"
title="Search within Matplotlib v1.1.1 documentation"
href="../../_static/opensearch.xml"/>
<link rel="top" title="Matplotlib v1.1.1 documentation" href="../../index.html" />
</head>
<body>
<!-- Piwik -->
<script type="text/javascript">
if ("matplotlib.sourceforge.net" == document.location.hostname ||
"matplotlib.sf.net" == document.location.hostname) {
var pkBaseURL = (("https:" == document.location.protocol) ? "https://apps.sourceforge.net/piwik/matplotlib/" : "http://apps.sourceforge.net/piwik/matplotlib/");
document.write(unescape("%3Cscript src='" + pkBaseURL + "piwik.js' type='text/javascript'%3E%3C/script%3E"));
}
</script>
<script type="text/javascript">
if ("matplotlib.sourceforge.net" == document.location.hostname ||
"matplotlib.sf.net" == document.location.hostname) {
piwik_action_name = '';
piwik_idsite = 1;
piwik_url = pkBaseURL + "piwik.php";
piwik_log(piwik_action_name, piwik_idsite, piwik_url);
document.write(unescape('%3Cobject%3E%3Cnoscript%3E%3Cp%3E%3Cimg src="http://apps.sourceforge.net/piwik/matplotlib/piwik.php?idsite=1" alt="piwik"/%3E%3C/p%3E%3C/noscript%3E%3C/object%3E'));
}
</script>
<!-- End Piwik Tag -->
<link rel="shortcut icon" href="_static/favicon.ico">
<div style="background-color: white; text-align: left; padding: 10px 10px 15px 15px">
<a href="../../index.html"><img src="../../_static/logo2.png" border="0" alt="matplotlib"/></a>
</div>
<div class="related">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../../genindex.html" title="General Index"
accesskey="I">index</a></li>
<li class="right" >
<a href="../../py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li><a href="../../index.html">home</a>| </li>
<li><a href="../../search.html">search</a>| </li>
<li><a href="../index.html">examples</a>| </li>
<li><a href="../../gallery.html">gallery</a>| </li>
<li><a href="../../contents.html">docs</a> »</li>
</ul>
</div>
<div class="sphinxsidebar">
<div class="sphinxsidebarwrapper">
<h3>This Page</h3>
<ul class="this-page-menu">
<li><a href="../../_sources/examples/pylab_examples/polar_demo.txt"
rel="nofollow">Show Source</a></li>
</ul>
<div id="searchbox" style="display: none">
<h3>Quick search</h3>
<form class="search" action="../../search.html" method="get">
<input type="text" name="q" size="18" />
<input type="submit" value="Go" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
<p class="searchtip" style="font-size: 90%">
Enter search terms or a module, class or function name.
</p>
</div>
<script type="text/javascript">$('#searchbox').show(0);</script>
</div>
</div>
<div class="document">
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body">
<div class="section" id="pylab-examples-example-code-polar-demo-py">
<span id="pylab-examples-polar-demo"></span><h1>pylab_examples example code: polar_demo.py<a class="headerlink" href="#pylab-examples-example-code-polar-demo-py" title="Permalink to this headline">ΒΆ</a></h1>
<p>(<a class="reference external" href="../../mpl_examples/pylab_examples/polar_demo.py">Source code</a>, <a class="reference external" href="../../mpl_examples/pylab_examples/polar_demo.png">png</a>, <a class="reference external" href="../../mpl_examples/pylab_examples/polar_demo.hires.png">hires.png</a>, <a class="reference external" href="../../mpl_examples/pylab_examples/polar_demo.pdf">pdf</a>)</p>
<div class="figure">
<img alt="../../_images/polar_demo.png" src="../../_images/polar_demo.png" />
</div>
<div class="highlight-python"><div class="highlight"><pre><span class="c">#!/usr/bin/env python</span>
<span class="c">#</span>
<span class="c"># matplotlib now has a PolarAxes class and a polar function in the</span>
<span class="c"># matplotlib interface. This is considered alpha and the interface</span>
<span class="c"># may change as we work out how polar axes should best be integrated</span>
<span class="c">#</span>
<span class="c"># The only function that has been tested on polar axes is "plot" (the</span>
<span class="c"># pylab interface function "polar" calls ax.plot where ax is a</span>
<span class="c"># PolarAxes) -- other axes plotting functions may work on PolarAxes</span>
<span class="c"># but haven't been tested and may need tweaking.</span>
<span class="c">#</span>
<span class="c"># you can get get a PolarSubplot instance by doing, for example</span>
<span class="c">#</span>
<span class="c"># subplot(211, polar=True)</span>
<span class="c">#</span>
<span class="c"># or a PolarAxes instance by doing</span>
<span class="c"># axes([left, bottom, width, height], polar=True)</span>
<span class="c">#</span>
<span class="c"># The view limits (eg xlim and ylim) apply to the lower left and upper</span>
<span class="c"># right of the rectangular box that surrounds to polar axes. Eg if</span>
<span class="c"># you have</span>
<span class="c">#</span>
<span class="c"># r = arange(0,1,0.01)</span>
<span class="c"># theta = 2*pi*r</span>
<span class="c">#</span>
<span class="c"># the lower left corner is 5/4pi, sqrt(2) and the</span>
<span class="c"># upper right corner is 1/4pi, sqrt(2)</span>
<span class="c">#</span>
<span class="c"># you could change the radial bounding box (zoom out) by setting the</span>
<span class="c"># ylim (radial coordinate is the second argument to the plot command,</span>
<span class="c"># as in MATLAB, though this is not advised currently because it is not</span>
<span class="c"># clear to me how the axes should behave in the change of view limits.</span>
<span class="c"># Please advise me if you have opinions. Likewise, the pan/zoom</span>
<span class="c"># controls probably do not do what you think they do and are better</span>
<span class="c"># left alone on polar axes. Perhaps I will disable them for polar</span>
<span class="c"># axes unless we come up with a meaningful, useful and functional</span>
<span class="c"># implementation for them.</span>
<span class="c">#</span>
<span class="c"># See the pylab rgrids and thetagrids functions for</span>
<span class="c"># information on how to customize the grid locations and labels</span>
<span class="kn">import</span> <span class="nn">matplotlib</span>
<span class="kn">import</span> <span class="nn">numpy</span> <span class="kn">as</span> <span class="nn">np</span>
<span class="kn">from</span> <span class="nn">matplotlib.pyplot</span> <span class="kn">import</span> <span class="n">figure</span><span class="p">,</span> <span class="n">show</span><span class="p">,</span> <span class="n">rc</span><span class="p">,</span> <span class="n">grid</span>
<span class="c"># radar green, solid grid lines</span>
<span class="n">rc</span><span class="p">(</span><span class="s">'grid'</span><span class="p">,</span> <span class="n">color</span><span class="o">=</span><span class="s">'#316931'</span><span class="p">,</span> <span class="n">linewidth</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">linestyle</span><span class="o">=</span><span class="s">'-'</span><span class="p">)</span>
<span class="n">rc</span><span class="p">(</span><span class="s">'xtick'</span><span class="p">,</span> <span class="n">labelsize</span><span class="o">=</span><span class="mi">15</span><span class="p">)</span>
<span class="n">rc</span><span class="p">(</span><span class="s">'ytick'</span><span class="p">,</span> <span class="n">labelsize</span><span class="o">=</span><span class="mi">15</span><span class="p">)</span>
<span class="c"># force square figure and square axes looks better for polar, IMO</span>
<span class="n">width</span><span class="p">,</span> <span class="n">height</span> <span class="o">=</span> <span class="n">matplotlib</span><span class="o">.</span><span class="n">rcParams</span><span class="p">[</span><span class="s">'figure.figsize'</span><span class="p">]</span>
<span class="n">size</span> <span class="o">=</span> <span class="nb">min</span><span class="p">(</span><span class="n">width</span><span class="p">,</span> <span class="n">height</span><span class="p">)</span>
<span class="c"># make a square figure</span>
<span class="n">fig</span> <span class="o">=</span> <span class="n">figure</span><span class="p">(</span><span class="n">figsize</span><span class="o">=</span><span class="p">(</span><span class="n">size</span><span class="p">,</span> <span class="n">size</span><span class="p">))</span>
<span class="n">ax</span> <span class="o">=</span> <span class="n">fig</span><span class="o">.</span><span class="n">add_axes</span><span class="p">([</span><span class="mf">0.1</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> <span class="mf">0.8</span><span class="p">,</span> <span class="mf">0.8</span><span class="p">],</span> <span class="n">polar</span><span class="o">=</span><span class="bp">True</span><span class="p">,</span> <span class="n">axisbg</span><span class="o">=</span><span class="s">'#d5de9c'</span><span class="p">)</span>
<span class="n">r</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mf">3.0</span><span class="p">,</span> <span class="mf">0.01</span><span class="p">)</span>
<span class="n">theta</span> <span class="o">=</span> <span class="mi">2</span><span class="o">*</span><span class="n">np</span><span class="o">.</span><span class="n">pi</span><span class="o">*</span><span class="n">r</span>
<span class="n">ax</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">theta</span><span class="p">,</span> <span class="n">r</span><span class="p">,</span> <span class="n">color</span><span class="o">=</span><span class="s">'#ee8d18'</span><span class="p">,</span> <span class="n">lw</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">set_rmax</span><span class="p">(</span><span class="mf">2.0</span><span class="p">)</span>
<span class="n">grid</span><span class="p">(</span><span class="bp">True</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">set_title</span><span class="p">(</span><span class="s">"And there was much rejoicing!"</span><span class="p">,</span> <span class="n">fontsize</span><span class="o">=</span><span class="mi">20</span><span class="p">)</span>
<span class="n">show</span><span class="p">()</span>
</pre></div>
</div>
<p>Keywords: python, matplotlib, pylab, example, codex (see <a class="reference internal" href="../../faq/howto_faq.html#how-to-search-examples"><em>Search examples</em></a>)</p>
</div>
</div>
</div>
</div>
<div class="clearer"></div>
</div>
<div class="related">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../../genindex.html" title="General Index"
>index</a></li>
<li class="right" >
<a href="../../py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li><a href="../../index.html">home</a>| </li>
<li><a href="../../search.html">search</a>| </li>
<li><a href="../index.html">examples</a>| </li>
<li><a href="../../gallery.html">gallery</a>| </li>
<li><a href="../../contents.html">docs</a> »</li>
</ul>
</div>
<div class="footer">
© Copyright 2008, John Hunter, Darren Dale, Michael Droettboom.
Last updated on Oct 04, 2012.
Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.0.7.
</div>
</body>
</html>
distrib
>
Mandriva
>
2010.2
>
i586
>
media
>
contrib-backports
>
by-pkgid
>
a44f8c7e78ee9c5838c1fb080c9e7630
>
files
>
2333
