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Interface weka.classifiers.trees.m5.SplitEvaluate

public interface SplitEvaluate
Interface for objects that determine a split point on an attribute

Version:
$Revision: 1.1 $
Author:
Mark Hall (mhall@cs.waikato.ac.nz)

Method Index

o attrSplit(int, Instances)
Finds the best splitting point for an attribute in the instances
o copy()
makes a copy of the SplitEvaluate object
o maxImpurity()
Returns the impurity of this split
o position()
Returns the position of the split in the sorted values.
o splitAttr()
Returns the attribute used in this split
o splitValue()
Returns the split value

Method Detail

o copy
public SplitEvaluate copy() throws java.lang.Exception
          makes a copy of the SplitEvaluate object
Returns:
a copy of the object
o attrSplit
public void attrSplit(int attr,
                      Instances inst) throws java.lang.Exception
          Finds the best splitting point for an attribute in the instances
Parameters:
attr - the splitting attribute
inst - the instances
Throws:
java.lang.Exception - if something goes wrong
o maxImpurity
public double maxImpurity()
          Returns the impurity of this split
Returns:
the impurity of this split
o position
public 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
o splitAttr
public int splitAttr()
          Returns the attribute used in this split
Returns:
the attribute used in this split
o splitValue
public double splitValue()
          Returns the split value
Returns:
the split value
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