uce the vector dimension (to a scalar), so the result type for <code>w</code> is an array of reals. In both cases, the size of the multiple index (here, 7) determines the size of the result.</p>
</section>
<section id="matrices" class="level3 unnumbered">
<h3 class="unnumbered anchored" data-anchor-id="matrices">Matrices</h3>
<p>Matrices are a bit trickier because they have two dimensions, but the underlying principle of type inference is the same—multiple indexes leave dimensions in place, whereas single