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<div class="section" id="barchart">
<span id="sphx-glr-gallery-api-barchart-py"></span><h1>Barchart<a class="headerlink" href="#barchart" title="Permalink to this headline">¶</a></h1>
<p>A bar plot with errorbars and height labels on individual bars</p>
<img alt="../../_images/sphx_glr_barchart_001.png" class="align-center" src="../../_images/sphx_glr_barchart_001.png" />
<div class="highlight-python"><div class="highlight"><pre><span></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="n">N</span> <span class="o">=</span> <span class="mi">5</span>
<span class="n">men_means</span> <span class="o">=</span> <span class="p">(</span><span class="mi">20</span><span class="p">,</span> <span class="mi">35</span><span class="p">,</span> <span class="mi">30</span><span class="p">,</span> <span class="mi">35</span><span class="p">,</span> <span class="mi">27</span><span class="p">)</span>
<span class="n">men_std</span> <span class="o">=</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="mi">4</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="n">ind</span> <span class="o">=</span> <a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.arange.html#numpy.arange" title="View documentation for numpy.arange"><span class="n">np</span><span class="o">.</span><span class="n">arange</span></a><span class="p">(</span><span class="n">N</span><span class="p">)</span> <span class="c1"># the x locations for the groups</span>
<span class="n">width</span> <span class="o">=</span> <span class="mf">0.35</span> <span class="c1"># the width of the bars</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">rects1</span> <span class="o">=</span> <span class="n">ax</span><span class="o">.</span><span class="n">bar</span><span class="p">(</span><span class="n">ind</span><span class="p">,</span> <span class="n">men_means</span><span class="p">,</span> <span class="n">width</span><span class="p">,</span> <span class="n">color</span><span class="o">=</span><span class="s1">'r'</span><span class="p">,</span> <span class="n">yerr</span><span class="o">=</span><span class="n">men_std</span><span class="p">)</span>
<span class="n">women_means</span> <span class="o">=</span> <span class="p">(</span><span class="mi">25</span><span class="p">,</span> <span class="mi">32</span><span class="p">,</span> <span class="mi">34</span><span class="p">,</span> <span class="mi">20</span><span class="p">,</span> <span class="mi">25</span><span class="p">)</span>
<span class="n">women_std</span> <span class="o">=</span> <span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">5</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="mi">3</span><span class="p">)</span>
<span class="n">rects2</span> <span class="o">=</span> <span class="n">ax</span><span class="o">.</span><span class="n">bar</span><span class="p">(</span><span class="n">ind</span> <span class="o">+</span> <span class="n">width</span><span class="p">,</span> <span class="n">women_means</span><span class="p">,</span> <span class="n">width</span><span class="p">,</span> <span class="n">color</span><span class="o">=</span><span class="s1">'y'</span><span class="p">,</span> <span class="n">yerr</span><span class="o">=</span><span class="n">women_std</span><span class="p">)</span>
<span class="c1"># add some text for labels, title and axes ticks</span>
<span class="n">ax</span><span class="o">.</span><span class="n">set_ylabel</span><span class="p">(</span><span class="s1">'Scores'</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">'Scores by group and gender'</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">set_xticks</span><span class="p">(</span><span class="n">ind</span> <span class="o">+</span> <span class="n">width</span> <span class="o">/</span> <span class="mi">2</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">set_xticklabels</span><span class="p">((</span><span class="s1">'G1'</span><span class="p">,</span> <span class="s1">'G2'</span><span class="p">,</span> <span class="s1">'G3'</span><span class="p">,</span> <span class="s1">'G4'</span><span class="p">,</span> <span class="s1">'G5'</span><span class="p">))</span>
<span class="n">ax</span><span class="o">.</span><span class="n">legend</span><span class="p">((</span><span class="n">rects1</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">rects2</span><span class="p">[</span><span class="mi">0</span><span class="p">]),</span> <span class="p">(</span><span class="s1">'Men'</span><span class="p">,</span> <span class="s1">'Women'</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">autolabel</span><span class="p">(</span><span class="n">rects</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Attach a text label above each bar displaying its height</span>
<span class="sd"> """</span>
<span class="k">for</span> <span class="n">rect</span> <span class="ow">in</span> <span class="n">rects</span><span class="p">:</span>
<span class="n">height</span> <span class="o">=</span> <span class="n">rect</span><span class="o">.</span><span class="n">get_height</span><span class="p">()</span>
<span class="n">ax</span><span class="o">.</span><span class="n">text</span><span class="p">(</span><span class="n">rect</span><span class="o">.</span><span class="n">get_x</span><span class="p">()</span> <span class="o">+</span> <span class="n">rect</span><span class="o">.</span><span class="n">get_width</span><span class="p">()</span><span class="o">/</span><span class="mf">2.</span><span class="p">,</span> <span class="mf">1.05</span><span class="o">*</span><span class="n">height</span><span class="p">,</span>
<span class="s1">'</span><span class="si">%d</span><span class="s1">'</span> <span class="o">%</span> <span class="nb">int</span><span class="p">(</span><span class="n">height</span><span class="p">),</span>
<span class="n">ha</span><span class="o">=</span><span class="s1">'center'</span><span class="p">,</span> <span class="n">va</span><span class="o">=</span><span class="s1">'bottom'</span><span class="p">)</span>
<span class="n">autolabel</span><span class="p">(</span><span class="n">rects1</span><span class="p">)</span>
<span class="n">autolabel</span><span class="p">(</span><span class="n">rects2</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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