><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">scores.test</span> <span class="op">&lt;-</span> <span class="va">X2</span> <span class="op"><a href="https://rdrr.io/r/base/matmult.html" class="external-link">%*%</a></span> <span class="va">test</span><span class="op">$</span><span class="va">v</span></span></span>
<span class="r-in"><span><span class="va">ind2</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/sets.html" class="external-