<!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>api example code: line_with_text.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) ? 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In this case, the line contains a Text instance to label it.</span> <span class="sd">"""</span> <span class="kn">import</span> <span class="nn">numpy</span> <span class="kn">as</span> <span class="nn">np</span> <span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="kn">as</span> <span class="nn">plt</span> <span class="kn">import</span> <span class="nn">matplotlib.lines</span> <span class="kn">as</span> <span class="nn">lines</span> <span class="kn">import</span> <span class="nn">matplotlib.transforms</span> <span class="kn">as</span> <span class="nn">mtransforms</span> <span class="kn">import</span> <span class="nn">matplotlib.text</span> <span class="kn">as</span> <span class="nn">mtext</span> <span class="k">class</span> <span class="nc">MyLine</span><span class="p">(</span><span class="n">lines</span><span class="o">.</span><span class="n">Line2D</span><span class="p">):</span> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> <span class="c"># we'll update the position when the line data is set</span> <span class="bp">self</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">mtext</span><span class="o">.</span><span class="n">Text</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="s">''</span><span class="p">)</span> <span class="n">lines</span><span class="o">.</span><span class="n">Line2D</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> <span class="c"># we can't access the label attr until *after* the line is</span> <span class="c"># inited</span> <span class="bp">self</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">set_text</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">get_label</span><span class="p">())</span> <span class="k">def</span> <span class="nf">set_figure</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">figure</span><span class="p">):</span> <span class="bp">self</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">set_figure</span><span class="p">(</span><span class="n">figure</span><span class="p">)</span> <span class="n">lines</span><span class="o">.</span><span class="n">Line2D</span><span class="o">.</span><span class="n">set_figure</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">figure</span><span class="p">)</span> <span class="k">def</span> <span class="nf">set_axes</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">axes</span><span class="p">):</span> <span class="bp">self</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">set_axes</span><span class="p">(</span><span class="n">axes</span><span class="p">)</span> <span class="n">lines</span><span class="o">.</span><span class="n">Line2D</span><span class="o">.</span><span class="n">set_axes</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">axes</span><span class="p">)</span> <span class="k">def</span> <span class="nf">set_transform</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">transform</span><span class="p">):</span> <span class="c"># 2 pixel offset</span> <span class="n">texttrans</span> <span class="o">=</span> <span class="n">transform</span> <span class="o">+</span> <span class="n">mtransforms</span><span class="o">.</span><span class="n">Affine2D</span><span class="p">()</span><span class="o">.</span><span class="n">translate</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">set_transform</span><span class="p">(</span><span class="n">texttrans</span><span class="p">)</span> <span class="n">lines</span><span class="o">.</span><span class="n">Line2D</span><span class="o">.</span><span class="n">set_transform</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">transform</span><span class="p">)</span> <span class="k">def</span> <span class="nf">set_data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">):</span> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">x</span><span class="p">):</span> <span class="bp">self</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">set_position</span><span class="p">((</span><span class="n">x</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">],</span> <span class="n">y</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]))</span> <span class="n">lines</span><span class="o">.</span><span class="n">Line2D</span><span class="o">.</span><span class="n">set_data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span> <span class="k">def</span> <span class="nf">draw</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">renderer</span><span class="p">):</span> <span class="c"># draw my label at the end of the line with 2 pixel offset</span> <span class="n">lines</span><span class="o">.</span><span class="n">Line2D</span><span class="o">.</span><span class="n">draw</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">renderer</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">draw</span><span class="p">(</span><span class="n">renderer</span><span class="p">)</span> <span class="n">fig</span> <span class="o">=</span> <span class="n">plt</span><span class="o">.</span><span class="n">figure</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_subplot</span><span class="p">(</span><span class="mi">111</span><span class="p">)</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">rand</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">20</span><span class="p">)</span> <span class="n">line</span> <span class="o">=</span> <span class="n">MyLine</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">,</span> <span class="n">mfc</span><span class="o">=</span><span class="s">'red'</span><span class="p">,</span> <span class="n">ms</span><span class="o">=</span><span class="mi">12</span><span class="p">,</span> <span class="n">label</span><span class="o">=</span><span class="s">'line label'</span><span class="p">)</span> <span class="c">#line.text.set_text('line label')</span> <span class="n">line</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">set_color</span><span class="p">(</span><span class="s">'red'</span><span class="p">)</span> <span class="n">line</span><span class="o">.</span><span class="n">text</span><span class="o">.</span><span class="n">set_fontsize</span><span class="p">(</span><span class="mi">16</span><span class="p">)</span> <span class="n">ax</span><span class="o">.</span><span class="n">add_line</span><span class="p">(</span><span class="n">line</span><span class="p">)</span> <span class="n">plt</span><span class="o">.</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> 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