p">(</span></span>
<span>  data <span class="op">=</span> <span class="va">dat</span>,</span>
<span>  group <span class="op">=</span> <span class="st">"ID"</span>,</span>
<span>  start_weibull <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/list.html" class="external-link">list</a></span><span class="op">(</span>a <span class="op">=</span> <span class="fl">4</span>, b <span class="op">=</span> <span class="fl">2</span><span class="op">)</span>,</span>
<span>  funct <span class="op