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<h4>prune</h4>
<pre>public&nbsp;int&nbsp;prune(double[]&nbsp;alphas,
        double[]&nbsp;errors,
        <a href="../../../../weka/core/Instances.html" title="class in weka.core">Instances</a>&nbsp;test)
          throws java.lang.Exception</pre>
<div class="block">Method for performing one fold in the cross-validation of the cost-complexity parameter.
 Generates a sequence of alpha-values with error estimates for the corresponding (partially pruned)
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