cale.html" class="external-link">scale</a></span><span class="op">(</span><span class="va">X</span>,center <span class="op">=</span> <span class="cn">TRUE</span>,scale <span class="op">=</span> <span class="cn">TRUE</span><span class="op">)</span></span>
<span class="r-in"><span class="va">y</span> <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/drop.html" class="external-link">drop</a></span><span class="op">(</span><span class="va">X</span> <span class="op"><a href="https://rdrr