<th>groupingVars</th>
      <td><p>character vector of column names to group by.</p></td>
    </tr>
    <tr>
      <th>wt</th>
      <td><p>character optional column name containing row-weights (passed to count/tally)</p></td>
    </tr>
    <tr>
      <th>sort</th>
      <td><p>logical if TRUE sort result in descending order</p></td>
    </tr>
    </table>

    <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>

    <p>.data with added column n, containing counts.</p>
    <h2 cl