/span>
<span><span class="co"># Add observation equations</span></span>
<span><span class="va">model</span><span class="op">$</span><span class="fu">addObs</span><span class="op">(</span></span>
<span>  <span class="va">y</span> <span class="op">~</span> <span class="va">x</span></span>
<span><span class="op">)</span></span>
<span></span>
<span><span class="co"># Set observation equation variances</span></span>
<span><span class="va">model</span><span class="op">$</span><span class="fu">setVariance</span><s