ne">\(6 \times 7\)</span> containing values that are <span class="math inline">\(3 \times 3\)</span> matrices,
and declares <code>z</code> to be a <span class="math inline">\(12 \times 8 \times 15\)</span> array of complex numbers.</p>
<p>Prior to 2.26 Stan models used a different syntax. The old syntax has
been deprecated as described in the <a href="deprecated-features.html#deprecated-features">Deprecated Features</a> chapter.</p>
</div>
<div id="constrained-data-types" class="section level3 unnumbered">
