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<div class="section" id="pylab-examples-example-code-pythonic-matplotlib-py">
<span id="pylab-examples-pythonic-matplotlib"></span><h1>pylab_examples example code: pythonic_matplotlib.py<a class="headerlink" href="#pylab-examples-example-code-pythonic-matplotlib-py" title="Permalink to this headline">ΒΆ</a></h1>
<p>(<a class="reference external" href="../../mpl_examples/pylab_examples/pythonic_matplotlib.py">Source code</a>)</p>
<div class="highlight-python"><div class="highlight"><pre><span class="c">#!/usr/bin/env python</span>
<span class="sd">"""</span>
<span class="sd">Some people prefer to write more pythonic, object oriented, code</span>
<span class="sd">rather than use the pylab interface to matplotlib. This example shows</span>
<span class="sd">you how.</span>
<span class="sd">Unless you are an application developer, I recommend using part of the</span>
<span class="sd">pylab interface, particularly the figure, close, subplot, axes, and</span>
<span class="sd">show commands. These hide a lot of complexity from you that you don't</span>
<span class="sd">need to see in normal figure creation, like instantiating DPI</span>
<span class="sd">instances, managing the bounding boxes of the figure elements,</span>
<span class="sd">creating and reaslizing GUI windows and embedding figures in them.</span>
<span class="sd">If you are an application developer and want to embed matplotlib in</span>
<span class="sd">your application, follow the lead of examples/embedding_in_wx.py,</span>
<span class="sd">examples/embedding_in_gtk.py or examples/embedding_in_tk.py. In this</span>
<span class="sd">case you will want to control the creation of all your figures,</span>
<span class="sd">embedding them in application windows, etc.</span>
<span class="sd">If you are a web application developer, you may want to use the</span>
<span class="sd">example in webapp_demo.py, which shows how to use the backend agg</span>
<span class="sd">figure canvase directly, with none of the globals (current figure,</span>
<span class="sd">current axes) that are present in the pylab interface. Note that</span>
<span class="sd">there is no reason why the pylab interface won't work for web</span>
<span class="sd">application developers, however.</span>
<span class="sd">If you see an example in the examples dir written in pylab interface,</span>
<span class="sd">and you want to emulate that using the true python method calls, there</span>
<span class="sd">is an easy mapping. Many of those examples use 'set' to control</span>
<span class="sd">figure properties. Here's how to map those commands onto instance</span>
<span class="sd">methods</span>
<span class="sd">The syntax of set is</span>
<span class="sd"> setp(object or sequence, somestring, attribute)</span>
<span class="sd">if called with an object, set calls</span>
<span class="sd"> object.set_somestring(attribute)</span>
<span class="sd">if called with a sequence, set does</span>
<span class="sd"> for object in sequence:</span>
<span class="sd"> object.set_somestring(attribute)</span>
<span class="sd">So for your example, if a is your axes object, you can do</span>
<span class="sd"> a.set_xticklabels([])</span>
<span class="sd"> a.set_yticklabels([])</span>
<span class="sd"> a.set_xticks([])</span>
<span class="sd"> a.set_yticks([])</span>
<span class="sd">"""</span>
<span class="kn">from</span> <span class="nn">pylab</span> <span class="kn">import</span> <span class="n">figure</span><span class="p">,</span> <span class="n">show</span>
<span class="kn">from</span> <span class="nn">numpy</span> <span class="kn">import</span> <span class="n">arange</span><span class="p">,</span> <span class="n">sin</span><span class="p">,</span> <span class="n">pi</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">arange</span><span class="p">(</span><span class="mf">0.0</span><span class="p">,</span> <span class="mf">1.0</span><span class="p">,</span> <span class="mf">0.01</span><span class="p">)</span>
<span class="n">fig</span> <span class="o">=</span> <span class="n">figure</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="n">ax1</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">211</span><span class="p">)</span>
<span class="n">ax1</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">t</span><span class="p">,</span> <span class="n">sin</span><span class="p">(</span><span class="mi">2</span><span class="o">*</span><span class="n">pi</span><span class="o">*</span><span class="n">t</span><span class="p">))</span>
<span class="n">ax1</span><span class="o">.</span><span class="n">grid</span><span class="p">(</span><span class="bp">True</span><span class="p">)</span>
<span class="n">ax1</span><span class="o">.</span><span class="n">set_ylim</span><span class="p">(</span> <span class="p">(</span><span class="o">-</span><span class="mi">2</span><span class="p">,</span><span class="mi">2</span><span class="p">)</span> <span class="p">)</span>
<span class="n">ax1</span><span class="o">.</span><span class="n">set_ylabel</span><span class="p">(</span><span class="s">'1 Hz'</span><span class="p">)</span>
<span class="n">ax1</span><span class="o">.</span><span class="n">set_title</span><span class="p">(</span><span class="s">'A sine wave or two'</span><span class="p">)</span>
<span class="k">for</span> <span class="n">label</span> <span class="ow">in</span> <span class="n">ax1</span><span class="o">.</span><span class="n">get_xticklabels</span><span class="p">():</span>
<span class="n">label</span><span class="o">.</span><span class="n">set_color</span><span class="p">(</span><span class="s">'r'</span><span class="p">)</span>
<span class="n">ax2</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">212</span><span class="p">)</span>
<span class="n">ax2</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">t</span><span class="p">,</span> <span class="n">sin</span><span class="p">(</span><span class="mi">2</span><span class="o">*</span><span class="mi">2</span><span class="o">*</span><span class="n">pi</span><span class="o">*</span><span class="n">t</span><span class="p">))</span>
<span class="n">ax2</span><span class="o">.</span><span class="n">grid</span><span class="p">(</span><span class="bp">True</span><span class="p">)</span>
<span class="n">ax2</span><span class="o">.</span><span class="n">set_ylim</span><span class="p">(</span> <span class="p">(</span><span class="o">-</span><span class="mi">2</span><span class="p">,</span><span class="mi">2</span><span class="p">)</span> <span class="p">)</span>
<span class="n">l</span> <span class="o">=</span> <span class="n">ax2</span><span class="o">.</span><span class="n">set_xlabel</span><span class="p">(</span><span class="s">'Hi mom'</span><span class="p">)</span>
<span class="n">l</span><span class="o">.</span><span class="n">set_color</span><span class="p">(</span><span class="s">'g'</span><span class="p">)</span>
<span class="n">l</span><span class="o">.</span><span class="n">set_fontsize</span><span class="p">(</span><span class="s">'large'</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>
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