<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="X-UA-Compatible" content="IE=Edge" />

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<meta name="viewport" content="width=device-width, initial-scale=1.0">

<title>MEP24: negative radius in polar plots &#8212; Matplotlib 3.2.2 documentation</title>

<link rel="stylesheet" href="../../_static/mpl.css?v3.2.2-2-g137edd56a" type="text/css" />

<link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />

<link rel="stylesheet" type="text/css" href="../../_static/graphviz.css" />

<link rel="stylesheet" type="text/css" href="../../_static/copybutton.css" />

<link rel="stylesheet" type="text/css" href="../../_static/gallery.css" />

<link rel="stylesheet" type="text/css" href="../../_static/gallery-binder.css" />

<link rel="stylesheet" type="text/css" href="../../_static/gallery-dataframe.css" />

<script id="documentation_options" data-url_root="../../" src="../../_static/documentation_options.js"></script>

<script src="../../_static/jquery.js"></script>

<script src="../../_static/underscore.js"></script>

<script src="../../_static/doctools.js"></script>

<script src="../../_static/language_data.js"></script>

<script src="../../_static/clipboard.min.js"></script>

<script src="../../_static/copybutton.js"></script>

<script async="async" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.7/latest.js?config=TeX-AMS-MML_HTMLorMML"></script>

<link rel="search" type="application/opensearchdescription+xml"

title="Search within Matplotlib 3.2.2 documentation"

href="../../_static/opensearch.xml"/>

<link rel="shortcut icon" href="../../_static/favicon.ico"/>

<link rel="index" title="Index" href="../../genindex.html" />

<link rel="search" title="Search" href="../../search.html" />

<link rel="next" title="MEP25: Serialization" href="MEP25.html" />

<link rel="prev" title="MEP23: Multiple Figures per GUI window" href="MEP23.html" />

<link rel="top" title="Matplotlib 3.2.2 documentation" href="#" />

<link rel="canonical" href="https://matplotlib.org/stable/devel/MEP/MEP24.html" />

<link rel="stylesheet" href="../../_static/custom.css" type="text/css" />

<meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />

<script data-domain="matplotlib.org" defer="defer" src="https://views.scientific-python.org/js/script.js"></script>

</head><body>

<div id="unreleased-message"> You are reading an old version of the documentation (v3.2.2). For the latest version see <a href="https://matplotlib.org/stable/devel/MEP/MEP24.html">https://matplotlib.org/stable/devel/MEP/MEP24.html</a></div>

<div style="background-color: white; text-align: left; padding: 10px 10px 15px 15px; position: relative;">

<a href="../../index.html">

<div style="float: left; position: absolute; width: 496px; bottom: 0; padding-bottom: 24px"><span style="float: right; color: #789; background: white">Version 3.2.2</span></div>

<img src="../../_static/logo2_compressed.svg" height="125px" border="0" alt="matplotlib"/></a>

<!-- The "Fork me on github" ribbon -->

<div id="forkongithub"><a href="https://github.com/matplotlib/matplotlib">Fork me on GitHub</a></div>

</div>

<nav class="main-nav">

<ul>

<li><a href="../../users/installing.html">Installation</a></li>

<li><a href="../../contents.html">Documentation</a></li>

<li><a href="../../gallery/index.html">Examples</a></li>

<li><a href="../../tutorials/index.html">Tutorials</a></li>

<li><a href="../index.html">Contributing</a></li>

<li class="nav-right">

<form class="search" action="../../search.html" method="get">

<input type="text" name="q" aria-labelledby="searchlabel" placeholder="Search"/>

</form>

</li>

</ul>

</nav>

<div class="related" role="navigation" aria-label="related navigation">

<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 class="right" >

<a href="MEP25.html" title="MEP25: Serialization"

accesskey="N">next</a> |</li>

<li class="right" >

<a href="MEP23.html" title="MEP23: Multiple Figures per GUI window"

accesskey="P">previous</a> |</li>

<li><a href="../../index.html">home</a>|&nbsp;</li>

<li><a href="../../contents.html">contents</a> &raquo;</li>

<li class="nav-item nav-item-1"><a href="../index.html" >The Matplotlib Developers' Guide</a> &#187;</li>

<li class="nav-item nav-item-2"><a href="index.html" accesskey="U">Matplotlib Enhancement Proposals</a> &#187;</li>

<li class="nav-item nav-item-this"><a href="">MEP24: negative radius in polar plots</a></li>

</ul>

</div>

<div class="sphinxsidebar" role="navigation" aria-label="main navigation">

<div class="sphinxsidebarwrapper">

<h3><a href="../../contents.html">Table of Contents</a></h3>

<ul>

<li><a class="reference internal" href="#">MEP24: negative radius in polar plots</a><ul>

<li><a class="reference internal" href="#status">Status</a></li>

<li><a class="reference internal" href="#branches-and-pull-requests">Branches and Pull requests</a></li>

<li><a class="reference internal" href="#abstract">Abstract</a></li>

<li><a class="reference internal" href="#detailed-description">Detailed description</a></li>

<li><a class="reference internal" href="#implementation">Implementation</a></li>

<li><a class="reference internal" href="#related-issues">Related Issues</a></li>

<li><a class="reference internal" href="#backward-compatibility">Backward compatibility</a></li>

<li><a class="reference internal" href="#alternatives">Alternatives</a></li>

<div class="relations">

<h3>Related Topics</h3>

<li><a href="../../contents.html">Documentation overview</a><ul>

<li><a href="../index.html">The Matplotlib Developers' Guide</a><ul>

<li><a href="index.html">Matplotlib Enhancement Proposals</a><ul>

<li>Previous: <a href="MEP23.html" title="previous chapter">MEP23: Multiple Figures per GUI window</a></li>

<li>Next: <a href="MEP25.html" title="next chapter">MEP25: Serialization</a></li>

</ul></li>

</ul></li>

</ul></li>

<div id="sidebar-pagesource" role="note" aria-label="source link"

style="margin-top: 1.5em; padding-top: 0.1em; border-top: 1px solid #86989b">

<a href="../../_sources/devel/MEP/MEP24.rst.txt"

style="color: #c0c0c0" rel="nofollow">Show Page Source</a>

</div>

</div>

</div>

<div class="document">

<div class="documentwrapper">

<div class="bodywrapper">

<div class="body" role="main">

<div class="section" id="mep24-negative-radius-in-polar-plots">

<h1>MEP24: negative radius in polar plots<a class="headerlink" href="#mep24-negative-radius-in-polar-plots" title="Permalink to this headline">¶</a></h1>

<div class="contents local topic" id="contents">

<ul class="simple">

<li><a class="reference internal" href="#status" id="id1">Status</a></li>

<li><a class="reference internal" href="#branches-and-pull-requests" id="id2">Branches and Pull requests</a></li>

<li><a class="reference internal" href="#abstract" id="id3">Abstract</a></li>

<li><a class="reference internal" href="#detailed-description" id="id4">Detailed description</a></li>

<li><a class="reference internal" href="#implementation" id="id5">Implementation</a></li>

<li><a class="reference internal" href="#related-issues" id="id6">Related Issues</a></li>

<li><a class="reference internal" href="#backward-compatibility" id="id7">Backward compatibility</a></li>

<li><a class="reference internal" href="#alternatives" id="id8">Alternatives</a></li>

<div class="section" id="status">

<h2><a class="toc-backref" href="#id1">Status</a><a class="headerlink" href="#status" title="Permalink to this headline">¶</a></h2>

<p><em>Discussion</em></p>

<div class="section" id="branches-and-pull-requests">

<h2><a class="toc-backref" href="#id2">Branches and Pull requests</a><a class="headerlink" href="#branches-and-pull-requests" title="Permalink to this headline">¶</a></h2>

<p>None</p>

<div class="section" id="abstract">

<h2><a class="toc-backref" href="#id3">Abstract</a><a class="headerlink" href="#abstract" title="Permalink to this headline">¶</a></h2>

<p>It is clear that polar plots need to be able to gracefully handle

negative r values (not by clipping or reflection).</p>

<div class="section" id="detailed-description">

<h2><a class="toc-backref" href="#id4">Detailed description</a><a class="headerlink" href="#detailed-description" title="Permalink to this headline">¶</a></h2>

<p>One obvious application that we should support is bB plots (see

<a class="reference external" href="https://github.com/matplotlib/matplotlib/issues/1730#issuecomment-40815837">https://github.com/matplotlib/matplotlib/issues/1730#issuecomment-40815837</a>),

but this seems more generally useful (for example growth rate as a

function of angle). The assumption in the current code (as I

understand it) is that the center of the graph is <code class="xref py py-obj docutils literal notranslate"><span class="pre">r==0</span></code>, however it

would be good to be able to set the center to be at any <code class="xref py py-obj docutils literal notranslate"><span class="pre">r</span></code> (with any

value less than the offset clipped).</p>

<div class="section" id="implementation">

<h2><a class="toc-backref" href="#id5">Implementation</a><a class="headerlink" href="#implementation" title="Permalink to this headline">¶</a></h2>

<div class="section" id="related-issues">

<h2><a class="toc-backref" href="#id6">Related Issues</a><a class="headerlink" href="#related-issues" title="Permalink to this headline">¶</a></h2>

<p>#1730, #1603, #2203, #2133</p>

<div class="section" id="backward-compatibility">

<h2><a class="toc-backref" href="#id7">Backward compatibility</a><a class="headerlink" href="#backward-compatibility" title="Permalink to this headline">¶</a></h2>

<div class="section" id="alternatives">

<h2><a class="toc-backref" href="#id8">Alternatives</a><a class="headerlink" href="#alternatives" title="Permalink to this headline">¶</a></h2>

</div>

</div>

</div>

<div class="clearer"></div>

</div>

<div class="footer">

&copy; Copyright 2002 - 2012 John Hunter, Darren Dale, Eric Firing, Michael Droettboom and the Matplotlib development team; 2012 - 2018 The Matplotlib development team.

<br />

Last updated on Jun 17, 2020.

Created using

<a href="http://sphinx-doc.org/">Sphinx</a> 3.1.1.

Doc version v3.2.2-2-g137edd56a.

</div>

</body>