Package weka.classifiers.trees.m5

Class CorrelationSplitInfo

java.lang.Object
weka.classifiers.trees.m5.CorrelationSplitInfo
All Implemented Interfaces:
Serializable, Cloneable, SplitEvaluate, RevisionHandler
public final class CorrelationSplitInfo extends Object implements Cloneable, Serializable, SplitEvaluate, RevisionHandler
Finds split points using correlation.
Version:
$Revision: 10169 $
Author:
Mark Hall (mhall@cs.waikato.ac.nz)
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    CorrelationSplitInfo(int low, int high, int attr)
    Constructs an object which contains the split information

  • Method Summary

    Modifier and Type
    Method
    Description
    final void
    attrSplit(int attr, Instances inst)
    Finds the best splitting point for an attribute in the instances
    final SplitEvaluate
    copy()
    Makes a copy of this CorrelationSplitInfo object
    String
    getRevision()
    Returns the revision string.
    final void
    initialize(int low, int high, int attr)
    Resets the object of split information
    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

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • CorrelationSplitInfo

      public CorrelationSplitInfo(int low, int high, int attr)
      Constructs an object which contains the split information
      Parameters:
      low - the index of the first instance
      high - the index of the last instance
      attr - an attribute

  • Method Details

    • copy

      public final SplitEvaluate copy() throws Exception
      Makes a copy of this CorrelationSplitInfo object
      Specified by:
      copy in interface SplitEvaluate
      Returns:
      a copy of the object
      Throws:
      Exception

    • initialize

      public final void initialize(int low, int high, int attr)
      Resets the object of split information
      Parameters:
      low - the index of the first instance
      high - the index of the last instance
      attr - the attribute

    • attrSplit

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

    • maxImpurity

      public double maxImpurity()
      Returns the impurity of this split
      Specified by:
      maxImpurity in interface SplitEvaluate
      Returns:
      the impurity of this split

    • splitAttr

      public int splitAttr()
      Returns the attribute used in this split
      Specified by:
      splitAttr in interface SplitEvaluate
      Returns:
      the attribute used in this split

    • position

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

    • splitValue

      public double splitValue()
      Returns the split value
      Specified by:
      splitValue in interface SplitEvaluate
      Returns:
      the split value

    • getRevision

      public String getRevision()
      Returns the revision string.
      Specified by:
      getRevision in interface RevisionHandler
      Returns:
      the revision