"va">Qmatrix</span>, irtmodel<span class="op">=</span><span class="st">"comp"</span>, est.a<span class="op">=</span><span class="st">"2PL"</span>,</span>
<span>            qmcnodes<span class="op">=</span><span class="fl">1000</span>, maxiter<span class="op">=</span><span class="fl">20</span><span class="op">)</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/base/summary.html" class="external-link">summary</a></span><span class="op">(</span><span class="va">mod1</span><span class="op">)</span