s="op">=</span> <span class="va">PARAMCD</span>, values_from <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="va">AVAL</span>,<span class="va">CNSR</span><span class="op">)</span><span class="op">)</span> </span>
<span></span>
<span><span class="co">#Derive Time to Progression Variable from OS and PFS</span></span>
<span><span class="va">tte.df</span> <span class="op">&lt;-</span> <span class="va">tte.d