ing</em> Plot title. Defaults to <code>NULL</code>.</p></td>
    </tr>
    <tr>
      <th>scale</th>
      <td><p>character indicating if the values should be centered and scaled in either 
the row direction or the column direction, or none. The default is "none".</p></td>
    </tr>
    <tr>
      <th>scale.by.range</th>
      <td><p>logical indicating whether to scale rows or columns by
the range of each row and column. Setting this parameter to <code>TRUE</code> 
automatically sets <code>na.rm</code> to <