  <span class="n">df</span><span class="o">.</span><span class="n">index</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">arange</span><span class="p">(</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 class="n">fig</span> <span class="o">=</span> <span class="n">df</span><span class="o">.</span><span class="n">iplot</span><span class="p">(</s