pan class="op">=</span> <span class="cn">F</span><span class="op">)</span><span class="op">)</span>, keyby <span class="op">=</span> <span class="fu">.</span><span class="op">(</span><span class="va">survPhi</span>, <span class="va">timesteps</span><span class="op">)</span><span class="op">]</span><span class="op">)</span> <span class="op">%&gt;%</span> <span class="fu"><a href="https://Rdatatable.gitlab.io/data.table/reference/rbindlist.html">rbindlist</a></span><span class="op">(</span><span class="op">)<