            <li>
                    This numeric variable is provided to the
                    <code>d3.histogram()</code> function that will compute the
                    binning and returns the coordinates of each bar.
                  </li>
                  <br />
                  <li>
                    These bars can thus be drawn using a classic
                    <code>.append("rect")</code> approach.
                  </li>
                </ul>
              </div>
            </div>
    