n class="st">"rater"</span><span class="op">)</span>,<span class="fu"><a href="https://rdrr.io/r/base/colnames.html" class="external-link">colnames</a></span><span class="op">(</span><span class="va">data</span><span class="op">)</span><span class="op">)</span></span>
<span>  <span class="va">items</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/grep.html" class="external-link">grep</a></span><span class="op">(</span><span class="st">"I"</span>,<span class="fu"><a href=