://www.rdocumentation.org/packages/rBayesianOptimization/topics/BayesianOptimization">rBayesianOptimization::BayesianOptimization()</a></code> function.</p>
<p>Except for <code><a href="../reference/xgb_cv_opt.html">xgb_cv_opt()</a></code> function, the returned value means test accuracy. In <code><a href="../reference/xgb_cv_opt.html">xgb_cv_opt()</a></code> function, he returned value means the value you specified in <code>evalmetric</code> option.</p>
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