/th>
      <td><p>length of the resulting encoding. Must be larger than zero and 
smaller than number of elements in the alphabet.</p></td>
    </tr>
    </table>

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

    <p>An encoding.</p>
    <h2 class="hasAnchor" id="details"><a class="anchor" href="#details"></a>Details</h2>

    <p>The encoding is a list of groups to which elements of an alphabet 
should be reduced. All elements of the alphabet (all 
amino acids or all n