he value is minus.</p>
<p>For details of these Random Forest options, see the help of <code><a href="http://www.rdocumentation.org/packages/xgboost/topics/xgb.train">xgboost::xgb.train()</a></code> or <code><a href="http://www.rdocumentation.org/packages/xgboost/topics/xgb.cv">xgboost::xgb.cv()</a></code> function.</p>
<div id="example-2" class="section level4">
<h4 class="hasAnchor">
<a href="#example-2" class="anchor"></a>Example</h4>
<div class="sourceCode"><pre class="sourceCode r"><code class="sourceCo