Package weka.classifiers.trees.m5

Interface SplitEvaluate

All Known Implementing Classes:
CorrelationSplitInfo, YongSplitInfo
public interface SplitEvaluate
Interface for objects that determine a split point on an attribute
Version:
$Revision: 8034 $
Author:
Mark Hall (mhall@cs.waikato.ac.nz)

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    attrSplit(int attr, Instances inst)
    Finds the best splitting point for an attribute in the instances
    SplitEvaluate
    copy()
    makes a copy of the SplitEvaluate object
    double
    maxImpurity()
    Returns the impurity of this split
    int
    position()
    Returns the position of the split in the sorted values.
    int
    splitAttr()
    Returns the attribute used in this split
    double
    splitValue()
    Returns the split value

  • Method Details

    • copy

      SplitEvaluate copy() throws Exception
      makes a copy of the SplitEvaluate object
      Returns:
      a copy of the object
      Throws:
      Exception

    • attrSplit

      void attrSplit(int attr, Instances inst) throws Exception
      Finds the best splitting point for an attribute in the instances
      Parameters:
      attr - the splitting attribute
      inst - the instances
      Throws:
      Exception - if something goes wrong

    • maxImpurity

      double maxImpurity()
      Returns the impurity of this split
      Returns:
      the impurity of this split

    • position

      int position()
      Returns the position of the split in the sorted values. -1 indicates that a split could not be found.
      Returns:
      an int value

    • splitAttr

      int splitAttr()
      Returns the attribute used in this split
      Returns:
      the attribute used in this split

    • splitValue

      double splitValue()
      Returns the split value
      Returns:
      the split value