" class="external-link">sd</a></span><span class="op">(</span><span class="va">dat</span><span class="op">)</span> <span class="op">/</span> <span class="fu"><a href="https://rdrr.io/r/base/MathFun.html" class="external-link">sqrt</a></span><span class="op">(</span><span class="va">N</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span>  <span class="co"># compute booties</span></span></span>
<span class="r-in"><span>  <span class="va">booties</span>