ef="table.html">table-based charts</a></li>
    <li>distribution charts</li>
    <li><a href="advanced.html">advanced calculations</a></li>
    <li><a href="error.html">error bars and bands</a></li>
    <li><a href="label.html">labelling and annotation</a></li>
    <li><a href="layer.html">other layered charts</a></li>
    <li><a href="facet.html">faceted plots</a></li>
    <li><a href="repeat.html">repeats and concatenation</a></li>
    <li><a href="geo.html">geographic maps</a></li>
    <li><a href="inter