/code>, <code>"down-right"</code>, <code>"down-left"</code>, <code>"left-down"</code>,
<code>"left-up"</code>, <code>"up-ish"</code>, <code>"down-ish"</code>, <code>"left-ish"</code> and <code>"right-ish"</code>. See
<code><a href='direction.html'>?direction</a></code>.</p></td>
    </tr>
    <tr>
      <th>drop</th>
      <td><p>Logical vector length 1. Whether data cells that can't be
associated with a header should be dropped.  Default: <code>TRUE</code>.</p></td>
    </tr>
    </table>


    <h2 class="