               <span class="dt">eval_metric =</span> <span class="st">"auc"</span>),
               <span class="dt">data =</span> dtrain, <span class="dt">nround =</span> <span class="dv">100</span>,
               <span class="dt">folds =</span> cv_folds, <span class="dt">prediction =</span> <span class="ot">TRUE</span>, <span class="dt">showsd =</span> <span class="ot">TRUE</span>,
               <span class="dt">early_stopping_rounds =</span> <span class="dv">5</span>, <span class="dt">maximize =</span>