"op">=</span> <span class="st">"rowtype"</span>, coltypes <span class="op">=</span> <span class="st">"Efficiencies"</span><span class="op">)</span> <span class="op"><a href="../reference/pipe.html">%&gt;%</a></span> </span>
<span>  <span class="fu"><a href="https://dplyr.tidyverse.org/reference/mutate.html" class="external-link">mutate</a></span><span class="op">(</span></span>
<span>    <span class="co"># Eliminate columns we no longer need.</span></span>
<span>    matrix.names <span class="op">=</span> <s