rdrr.io/r/base/list.html" class="external-link">list</a></span><span class="op">(</span>V <span class="op">=</span> <span class="fl">2</span><span class="op">)</span>,</span></span>
<span class="r-in"><span>           stratified <span class="op">=</span> <span class="cn">TRUE</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># using pre-computed fitted values</span></span></span>
<span class="r-in"><span><span class="fu"><a href="