fl">7656</span><span class="op">)</span></span>
<span><span class="va">I</span> <span class="op">&lt;-</span> <span class="fl">10</span>         <span class="co"># number of items</span></span>
<span><span class="va">N</span> <span class="op">&lt;-</span> <span class="fl">2000</span>        <span class="co"># number of subjects</span></span>
<span><span class="va">Q</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/matrix.html" class="external-link">matrix</a></span><span