plot</a>. Note that all groups
          are stored in different column of the <code>.csv</code> input file.
          This example works with d3.js <code>v4</code> and <code>v6</code>
        </p>
        <br />
        <a class="btn btn-secondary btn-md text-uppercase" href="../line.html"
          >Line chart section</a
        >
        <button
          class="btn btn-secondary btn-md text-uppercase"
          onclick="myCodeDownload('chart_example_from_d3-graph-gallery.html', 'code-html-v4', 'code-js-