>seq</a></span><span class="op">(</span><span class="fl">18</span>, <span class="fl">60</span><span class="op">)</span>, size <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/nrow.html" class="external-link">nrow</a></span><span class="op">(</span><span class="va">mydata</span><span class="op">)</span>, replace <span class="op">=</span> <span class="cn">TRUE</span><span class="op">)</span><span class="op">)</span></span>
<span><span class="va">mydata</span><span class="op">$</span>