s="odd">
<td align="center"><code>a[i]</code></td>
<td align="center">single</td>
<td align="center">n/a</td>
<td align="center">row vector</td>
</tr>
<tr class="even">
<td align="center"><code>a[is]</code></td>
<td align="center">multiple</td>
<td align="center">n/a</td>
<td align="center">matrix</td>
</tr>
<tr class="odd">
<td align="center"><code>a[i, j]</code></td>
<td align="center">single</td>
<td align="center">single</td>
<td align="center">real</td>
</tr>
<tr class="even">
<td align="center"><code>