ame" /><col class="desc" /></colgroup>
    <tr>
      <th>data</th>
      <td><p>data.frame</p></td>
    </tr>
    <tr>
      <th>...</th>
      <td><p>List of variables or name-value pairs of summary/modifications
functions.</p></td>
    </tr>
    <tr>
      <th>cols</th>
      <td><p>(Optional)A numeric or character vector.</p></td>
    </tr>
    <tr>
      <th>negate</th>
      <td><p>Applicable when regular expression is used.
If <code>TRUE</code>, return the non-matched pattern. Defaul