"># define a new Q-matrix</span></span>
<span><span class="va">Qmatrix1</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://amices.org/mice/reference/cbind.html" class="external-link">cbind</a></span><span class="op">(</span> <span class="fl">1</span>, <span class="va">Qmatrix</span> <span class="op">)</span></span>
<span><span class="co"># uncorrelated factors</span></span>
<span><span class="va">variance.fixed</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://amices