lass="co"># some plots</span></span>
<span><span class="fu">mirt</span><span class="fu">::</span><span class="fu"><a href="https://rdrr.io/pkg/mirt/man/itemplot.html" class="external-link">itemplot</a></span><span class="op">(</span> <span class="va">mres</span>, <span class="fl">3</span> <span class="op">)</span>   <span class="co"># third item</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><span class="op">(</span><span clas