as <code>m[3, ]</code>
or <code>m[3, 1:cols(m)]</code>.</p>
</div>
<div id="arrays-of-vectors-or-matrices" class="section level3">
<h3 class="unnumbered" number="">Arrays of Vectors or Matrices</h3>
<p>With arrays of matrices, vectors, and row vectors, the basic access
rules remain exactly the same: single indexes reduce dimensionality
and multiple indexes redirect indexes. For example, consider the
following example.</p>
<pre><code>matrix[3, 4] m[5, 7];
...
matrix[3, 4] a[2];
a = m[1, 2:3];  // knock off f