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<div class="section" id="axes-grid-example-code-demo-axes-rgb-py">
<span id="axes-grid-demo-axes-rgb"></span><h1>axes_grid example code: demo_axes_rgb.py<a class="headerlink" href="#axes-grid-example-code-demo-axes-rgb-py" title="Permalink to this headline">ΒΆ</a></h1>
<p>(<a class="reference external" href="../../mpl_examples/axes_grid/demo_axes_rgb.py">Source code</a>)</p>
<div class="highlight-python"><div class="highlight"><pre><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">from</span> <span class="nn">mpl_toolkits.axes_grid1.axes_rgb</span> <span class="kn">import</span> <span class="n">make_rgb_axes</span><span class="p">,</span> <span class="n">RGBAxes</span>
<span class="k">def</span> <span class="nf">get_demo_image</span><span class="p">():</span>
<span class="kn">from</span> <span class="nn">matplotlib.cbook</span> <span class="kn">import</span> <span class="n">get_sample_data</span>
<span class="n">f</span> <span class="o">=</span> <span class="n">get_sample_data</span><span class="p">(</span><span class="s">"axes_grid/bivariate_normal.npy"</span><span class="p">,</span> <span class="n">asfileobj</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="n">z</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">load</span><span class="p">(</span><span class="n">f</span><span class="p">)</span>
<span class="c"># z is a numpy array of 15x15</span>
<span class="k">return</span> <span class="n">z</span><span class="p">,</span> <span class="p">(</span><span class="o">-</span><span class="mi">3</span><span class="p">,</span><span class="mi">4</span><span class="p">,</span><span class="o">-</span><span class="mi">4</span><span class="p">,</span><span class="mi">3</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_rgb</span><span class="p">():</span>
<span class="n">Z</span><span class="p">,</span> <span class="n">extent</span> <span class="o">=</span> <span class="n">get_demo_image</span><span class="p">()</span>
<span class="n">Z</span><span class="p">[</span><span class="n">Z</span><span class="o"><</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="mf">0.</span>
<span class="n">Z</span> <span class="o">=</span> <span class="n">Z</span><span class="o">/</span><span class="n">Z</span><span class="o">.</span><span class="n">max</span><span class="p">()</span>
<span class="n">R</span> <span class="o">=</span> <span class="n">Z</span><span class="p">[:</span><span class="mi">13</span><span class="p">,:</span><span class="mi">13</span><span class="p">]</span>
<span class="n">G</span> <span class="o">=</span> <span class="n">Z</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="n">B</span> <span class="o">=</span> <span class="n">Z</span><span class="p">[:</span><span class="mi">13</span><span class="p">,</span><span class="mi">2</span><span class="p">:]</span>
<span class="k">return</span> <span class="n">R</span><span class="p">,</span> <span class="n">G</span><span class="p">,</span> <span class="n">B</span>
<span class="k">def</span> <span class="nf">make_cube</span><span class="p">(</span><span class="n">r</span><span class="p">,</span> <span class="n">g</span><span class="p">,</span> <span class="n">b</span><span class="p">):</span>
<span class="n">ny</span><span class="p">,</span> <span class="n">nx</span> <span class="o">=</span> <span class="n">r</span><span class="o">.</span><span class="n">shape</span>
<span class="n">R</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">zeros</span><span class="p">([</span><span class="n">ny</span><span class="p">,</span> <span class="n">nx</span><span class="p">,</span> <span class="mi">3</span><span class="p">],</span> <span class="n">dtype</span><span class="o">=</span><span class="s">"d"</span><span class="p">)</span>
<span class="n">R</span><span class="p">[:,:,</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="n">r</span>
<span class="n">G</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">zeros_like</span><span class="p">(</span><span class="n">R</span><span class="p">)</span>
<span class="n">G</span><span class="p">[:,:,</span><span class="mi">1</span><span class="p">]</span> <span class="o">=</span> <span class="n">g</span>
<span class="n">B</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">zeros_like</span><span class="p">(</span><span class="n">R</span><span class="p">)</span>
<span class="n">B</span><span class="p">[:,:,</span><span class="mi">2</span><span class="p">]</span> <span class="o">=</span> <span class="n">b</span>
<span class="n">RGB</span> <span class="o">=</span> <span class="n">R</span> <span class="o">+</span> <span class="n">G</span> <span class="o">+</span> <span class="n">B</span>
<span class="k">return</span> <span class="n">R</span><span class="p">,</span> <span class="n">G</span><span class="p">,</span> <span class="n">B</span><span class="p">,</span> <span class="n">RGB</span>
<span class="k">def</span> <span class="nf">demo_rgb</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="mi">1</span><span class="p">)</span>
<span class="n">fig</span><span class="o">.</span><span class="n">clf</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">ax_r</span><span class="p">,</span> <span class="n">ax_g</span><span class="p">,</span> <span class="n">ax_b</span> <span class="o">=</span> <span class="n">make_rgb_axes</span><span class="p">(</span><span class="n">ax</span><span class="p">,</span> <span class="n">pad</span><span class="o">=</span><span class="mf">0.02</span><span class="p">)</span>
<span class="c">#fig.add_axes(ax_r)</span>
<span class="c">#fig.add_axes(ax_g)</span>
<span class="c">#fig.add_axes(ax_b)</span>
<span class="n">r</span><span class="p">,</span> <span class="n">g</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">get_rgb</span><span class="p">()</span>
<span class="n">im_r</span><span class="p">,</span> <span class="n">im_g</span><span class="p">,</span> <span class="n">im_b</span><span class="p">,</span> <span class="n">im_rgb</span> <span class="o">=</span> <span class="n">make_cube</span><span class="p">(</span><span class="n">r</span><span class="p">,</span> <span class="n">g</span><span class="p">,</span> <span class="n">b</span><span class="p">)</span>
<span class="n">kwargs</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">origin</span><span class="o">=</span><span class="s">"lower"</span><span class="p">,</span> <span class="n">interpolation</span><span class="o">=</span><span class="s">"nearest"</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">imshow</span><span class="p">(</span><span class="n">im_rgb</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="n">ax_r</span><span class="o">.</span><span class="n">imshow</span><span class="p">(</span><span class="n">im_r</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="n">ax_g</span><span class="o">.</span><span class="n">imshow</span><span class="p">(</span><span class="n">im_g</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="n">ax_b</span><span class="o">.</span><span class="n">imshow</span><span class="p">(</span><span class="n">im_b</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">demo_rgb2</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="mi">2</span><span class="p">)</span>
<span class="n">ax</span> <span class="o">=</span> <span class="n">RGBAxes</span><span class="p">(</span><span class="n">fig</span><span class="p">,</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">pad</span><span class="o">=</span><span class="mf">0.0</span><span class="p">)</span>
<span class="c">#fig.add_axes(ax)</span>
<span class="c">#ax.add_RGB_to_figure()</span>
<span class="n">r</span><span class="p">,</span> <span class="n">g</span><span class="p">,</span> <span class="n">b</span> <span class="o">=</span> <span class="n">get_rgb</span><span class="p">()</span>
<span class="n">kwargs</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">origin</span><span class="o">=</span><span class="s">"lower"</span><span class="p">,</span> <span class="n">interpolation</span><span class="o">=</span><span class="s">"nearest"</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">imshow_rgb</span><span class="p">(</span><span class="n">r</span><span class="p">,</span> <span class="n">g</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">RGB</span><span class="o">.</span><span class="n">set_xlim</span><span class="p">(</span><span class="mf">0.</span><span class="p">,</span> <span class="mf">9.5</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">RGB</span><span class="o">.</span><span class="n">set_ylim</span><span class="p">(</span><span class="mf">0.9</span><span class="p">,</span> <span class="mf">10.6</span><span class="p">)</span>
<span class="k">for</span> <span class="n">ax1</span> <span class="ow">in</span> <span class="p">[</span><span class="n">ax</span><span class="o">.</span><span class="n">RGB</span><span class="p">,</span> <span class="n">ax</span><span class="o">.</span><span class="n">R</span><span class="p">,</span> <span class="n">ax</span><span class="o">.</span><span class="n">G</span><span class="p">,</span> <span class="n">ax</span><span class="o">.</span><span class="n">B</span><span class="p">]:</span>
<span class="k">for</span> <span class="n">sp1</span> <span class="ow">in</span> <span class="n">ax1</span><span class="o">.</span><span class="n">spines</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
<span class="n">sp1</span><span class="o">.</span><span class="n">set_color</span><span class="p">(</span><span class="s">"w"</span><span class="p">)</span>
<span class="k">for</span> <span class="n">tick</span> <span class="ow">in</span> <span class="n">ax1</span><span class="o">.</span><span class="n">xaxis</span><span class="o">.</span><span class="n">get_major_ticks</span><span class="p">()</span> <span class="o">+</span> <span class="n">ax1</span><span class="o">.</span><span class="n">yaxis</span><span class="o">.</span><span class="n">get_major_ticks</span><span class="p">():</span>
<span class="n">tick</span><span class="o">.</span><span class="n">tick1line</span><span class="o">.</span><span class="n">set_mec</span><span class="p">(</span><span class="s">"w"</span><span class="p">)</span>
<span class="n">tick</span><span class="o">.</span><span class="n">tick2line</span><span class="o">.</span><span class="n">set_mec</span><span class="p">(</span><span class="s">"w"</span><span class="p">)</span>
<span class="k">return</span> <span class="n">ax</span>
<span class="n">demo_rgb</span><span class="p">()</span>
<span class="n">ax</span> <span class="o">=</span> <span class="n">demo_rgb2</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>
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