an class="fl">5</span><span class="op">:</span><span class="fl">8</span>, drop <span class="op">=</span> <span class="cn">FALSE</span><span class="op">]</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/colSums.html" class="external-link">rowSums</a></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">theta1</span> <span class="op">*</span> <sp