lot.</span>
<span class="sd">    </span>
<span class="sd">  Returns</span>
<span class="sd">  -------</span>
<span class="sd">  html</span>
<span class="sd">    HTML code for the plot.</span>

<span class="sd">  &quot;&quot;&quot;</span>
  <span class="n">cp</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span>
  <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">df</span><span class="o">.</span><span class="n">index</span><span class="p">)</span> <span