"fl">0.5</span> <span class="op">*</span> <span class="va">x</span><span class="op">[</span>,<span class="fl">13</span><span class="op">]</span></span>
<span class="r-in"><span class="va">trt.prob</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/Log.html" class="external-link">exp</a></span><span class="op">(</span><span class="va">xbetat</span><span class="op">)</span> <span class="op">/</span> <span class="op">(</span><span class="fl">1</span> <span class="op">+</span>