andline call. Only needed if <code>parallel=TRUE</code>.</p></td>
    </tr>
    <tr>
      <th>clustertype</th>
      <td><p>type of cluster, character. 'SOCK' for socket cluster, 'MPI', 'PVM' or 'NWS'. Only considered if <code>parallel=TRUE</code>. If so, a socket cluster, which does not require any additional installation, is started as default.</p></td>
    </tr>
    <tr>
      <th>clusterhosts</th>
      <td><p>host list for socket and NWS clusters, if <code>parallel=TRUE</code>. Has to be specified onl