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<p class="last">Click <a class="reference internal" href="#sphx-glr-download-gallery-misc-agg-buffer-to-array-py"><span class="std std-ref">here</span></a> to download the full example code</p>
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<div class="sphx-glr-example-title section" id="agg-buffer-to-array">
<span id="sphx-glr-gallery-misc-agg-buffer-to-array-py"></span><h1>Agg Buffer To Array<a class="headerlink" href="#agg-buffer-to-array" title="Permalink to this headline">¶</a></h1>
<p>Convert a rendered figure to its image (NumPy array) representation.</p>
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<li><img alt="../../_images/sphx_glr_agg_buffer_to_array_001.png" class="sphx-glr-multi-img first" src="../../_images/sphx_glr_agg_buffer_to_array_001.png" />
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="k">as</span> <span class="nn">plt</span>
<span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>
<span class="c1"># make an agg figure</span>
<span class="n">fig</span><span class="p">,</span> <span class="n">ax</span> <span class="o">=</span> <a href="../../api/_as_gen/matplotlib.pyplot.subplots.html#matplotlib.pyplot.subplots" title="View documentation for matplotlib.pyplot.subplots"><span class="n">plt</span><span class="o">.</span><span class="n">subplots</span></a><span class="p">()</span>
<span class="n">ax</span><span class="o">.</span><span class="n">plot</span><span class="p">([</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</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="s1">'a simple figure'</span><span class="p">)</span>
<span class="n">fig</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">draw</span><span class="p">()</span>
<span class="c1"># grab the pixel buffer and dump it into a numpy array</span>
<span class="n">X</span> <span class="o">=</span> <a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.array.html#numpy.array" title="View documentation for numpy.array"><span class="n">np</span><span class="o">.</span><span class="n">array</span></a><span class="p">(</span><span class="n">fig</span><span class="o">.</span><span class="n">canvas</span><span class="o">.</span><span class="n">renderer</span><span class="o">.</span><span class="n">buffer_rgba</span><span class="p">())</span>
<span class="c1"># now display the array X as an Axes in a new figure</span>
<span class="n">fig2</span> <span class="o">=</span> <a href="../../api/_as_gen/matplotlib.pyplot.figure.html#matplotlib.pyplot.figure" title="View documentation for matplotlib.pyplot.figure"><span class="n">plt</span><span class="o">.</span><span class="n">figure</span></a><span class="p">()</span>
<span class="n">ax2</span> <span class="o">=</span> <span class="n">fig2</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">frameon</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
<span class="n">ax2</span><span class="o">.</span><span class="n">imshow</span><span class="p">(</span><span class="n">X</span><span class="p">)</span>
<a href="../../api/_as_gen/matplotlib.pyplot.show.html#matplotlib.pyplot.show" title="View documentation for matplotlib.pyplot.show"><span class="n">plt</span><span class="o">.</span><span class="n">show</span></a><span class="p">()</span>
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<a class="reference download internal" download="" href="../../_downloads/3ac4d16969d07d8e88df1b6b11a4a671/agg_buffer_to_array.ipynb"><code class="xref download docutils literal notranslate"><span class="pre">Download</span> <span class="pre">Jupyter</span> <span class="pre">notebook:</span> <span class="pre">agg_buffer_to_array.ipynb</span></code></a></div>
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<p class="sphx-glr-signature">Keywords: matplotlib code example, codex, python plot, pyplot
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