sing
    planar arithmetic, or <b>autoTree(n)</b> for a model using spatial
    arithmetic but having slightly different inertias</td>
</tr>

<tr><td></td></tr>
<tr><td></td></tr>

<tr>
  <th colspan="2">Planar Vector Arithmetic</th>
</tr>
<tr>
  <td><b>crfp</b></td>
  <td>use <b>crf</b> instead</td>
</tr>
<tr>
  <td><b>crmp</b></td>
  <td>use <b>crm</b> instead</td>
</tr>
<tr>
  <td><b>mcIp</b></td>
  <td>use <b>mcI</b> instead</td>
</tr>
<tr>
  <td><b>Xpln</b></td>
  <td>name changed to <b>plnr</b></td>
<