weka.classifiers.mi.miti

Class SufficientBagStatistics

java.lang.Object

weka.classifiers.mi.miti.SufficientBagStatistics

All Implemented Interfaces:

SufficientStatistics

public class SufficientBagStatistics
extends java.lang.Object
implements SufficientStatistics

Class that maintains sufficient statistics at the bag level.

Version:

$Revision: 8109 $

Author:

Luke Bjerring

Constructor Summary

Constructors

Constructor and Description
SufficientBagStatistics(java.util.List<weka.core.Instance> allInstances, java.util.HashMap<weka.core.Instance,Bag> instanceBags, double instanceConstant) Sets up the object initially by assigning all cases to the right subset.

Method Summary

Modifier and Type	Method and Description
double	positiveCountLeft() The number of positive cases on the left side.
double	positiveCountRight() The number of positive cases on the right side.
double	totalCountLeft() Number of cases on the left side.
double	totalCountRight() Number of cases on the right side.
void	updateStats(weka.core.Instance i, java.util.HashMap<weka.core.Instance,Bag> instanceBags) Updates the sufficient statistics assuming a shift of instance i from the right of the split to the left

Methods inherited from class java.lang.Object

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

Constructor Detail

SufficientBagStatistics

public SufficientBagStatistics(java.util.List<weka.core.Instance> allInstances,
                               java.util.HashMap<weka.core.Instance,Bag> instanceBags,
                               double instanceConstant)

Sets up the object initially by assigning all cases to the right subset.

Method Detail

updateStats

public void updateStats(weka.core.Instance i,
                        java.util.HashMap<weka.core.Instance,Bag> instanceBags)

Updates the sufficient statistics assuming a shift of instance i from the right of the split to the left

Specified by:

updateStats in interface SufficientStatistics

positiveCountLeft

public double positiveCountLeft()

The number of positive cases on the left side.

Specified by:

positiveCountLeft in interface SufficientStatistics

positiveCountRight

public double positiveCountRight()

The number of positive cases on the right side.

Specified by:

positiveCountRight in interface SufficientStatistics

totalCountLeft

public double totalCountLeft()

Number of cases on the left side.

Specified by:

totalCountLeft in interface SufficientStatistics

totalCountRight

public double totalCountRight()

Number of cases on the right side.

Specified by:

totalCountRight in interface SufficientStatistics