lass="header">
<th align="left">type</th>
<th align="left">primitive type</th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td align="left"><code>int</code></td>
<td align="left"><code>int</code></td>
</tr>
<tr class="even">
<td align="left"><code>real</code></td>
<td align="left"><code>real</code></td>
</tr>
<tr class="odd">
<td align="left"><code>matrix</code></td>
<td align="left"><code>matrix</code></td>
</tr>
<tr class="even">
<td align="left"><code>cov_matrix</code></td>
<td align="left"><code>matrix</cod