or a total of 5 columns.</p>
</section>
</section>
<section id="matrices-with-parameters-and-constants" class="level2">
<h2 class="anchored" data-anchor-id="matrices-with-parameters-and-constants">Matrices with parameters and constants</h2>
<p>Suppose you have a <span class="math inline">\(3 x 3\)</span> matrix and know that two entries are zero but the others are parameters. Such a situation arises in missing data situations and in problems with fixed structural parameters.</p>
<p>Suppose a <span class="ma