           >input dataset</a
                    >
                    is composed by several columns: one per group.
                  </li>
                  <br />
                  <li>Chart is initialized using the first group.</li>
                  <br />
                  <li>
                    Then a <code>update()</code> function is created. It
                    smoothly transforms the chart with the value of another
                    column
                  </li>
                  <br />
 