">I</span><span class="op">)</span><span class="op">]</span> <span class="op">&lt;-</span> <span class="fl">1</span></span>
<span><span class="va">mod1</span> <span class="op">&lt;-</span> <span class="fu">sirt</span><span class="fu">::</span><span class="fu">smirt</span><span class="op">(</span> <span class="va">dat</span>, Qmatrix<span class="op">=</span><span class="va">Q</span>, irtmodel<span class="op">=</span><span class="st">"partcomp"</span>, est.mu.i<span class="op">=</span><span class="va">est.mu.