><span class="op">(</span></span>
<span>  <span class="va">.model</span>,</span>
<span>  <span class="va">.data</span>,</span>
<span>  .ext_reg <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  .frequency <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  .bootstrap <span class="op">=</span> <span class="cn">TRUE</span>,</span>
<span>  .horizon <span class="op">=</span> <span class="fl">4</span>,</span>
<span>  .iterations <span class="op">=</span> <span class="fl">2