an class="op">(</span></span>
<span>  <span class="va">model</span>,</span>
<span>  path <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/getwd.html" class="external-link">getwd</a></span><span class="op">(</span><span class="op">)</span>,</span>
<span>  iter <span class="op">=</span> <span class="fl">2000</span>,</span>
<span>  init <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  chains <span class="op">=</span> <span class="fl">3</span>,</span>
<span>