edu.indiana.iucbrf.feature.stats
Class FeatureStats

java.lang.Object
  edu.indiana.iucbrf.feature.stats.FeatureStats

public class FeatureStats
extends java.lang.Object

Field Summary

protected CaseBase	cb
protected java.util.HashMap	dependencies Maps FeatureKeys to feature's dependencies
protected Domain	domain
protected java.util.HashMap	maxVals Maps FeatureKeys to feature's maximum observed value
protected java.util.HashMap	means Maps FeatureKeys to mean feature values
protected java.util.HashMap	minVals Maps FeatureKeys to feature's minimum observed value
protected double	mostDependentThreshold
protected java.util.HashMap	stdDevs Maps FeatureKeys to feature's standard deviation

Constructor Summary

FeatureStats(CaseBase cb, Domain domain)
For this constructor, calcStats is called, but calcDependencies() is not.

FeatureStats(CaseBase cb, Domain domain, double mostDependentThreshold)
For this constructor, both calcStats and calcDpendencies() are called.

Method Summary

void	calcDependencies(double mostDependentThreshold)
protected double	calcMeanAndMinMax(FeatureKey featureKey)
protected void	calcStats() This method calls calcMean() and calcStdDev() as well, so they do not need to be called separately.
protected double	calcStdDev(FeatureKey featureKey, double mean)
double	getDependence(FeatureKey primary, FeatureKey other) Dependence is not necessarily symmetric.
FeatureDependence	getFeatureDependence(FeatureKey primary)
double	getMaxValue(FeatureKey key)
double	getMean(FeatureKey key)
double	getMinValue(FeatureKey key)
java.util.HashSet	getMostDependent(FeatureKey primary)
double	getStdDev(FeatureKey key)
void	setDependencies(double mostDependentThreshold, FeatureKey[] allKeys, double[][] deps)
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

means

protected java.util.HashMap means

Maps FeatureKeys to mean feature values

stdDevs

protected java.util.HashMap stdDevs

Maps FeatureKeys to feature's standard deviation

dependencies

protected java.util.HashMap dependencies

Maps FeatureKeys to feature's dependencies

minVals

protected java.util.HashMap minVals

Maps FeatureKeys to feature's minimum observed value

maxVals

protected java.util.HashMap maxVals

Maps FeatureKeys to feature's maximum observed value

mostDependentThreshold

protected double mostDependentThreshold

cb

protected CaseBase cb

domain

protected Domain domain

Constructor Detail

FeatureStats

public FeatureStats(CaseBase cb,
                    Domain domain)

For this constructor, calcStats is called, but calcDependencies() is not. If dependence information is needed, either calcDependencies() or setDependencies() may subsequently be called.

FeatureStats

public FeatureStats(CaseBase cb,
                    Domain domain,
                    double mostDependentThreshold)

For this constructor, both calcStats and calcDpendencies() are called.

Method Detail

getMean

public double getMean(FeatureKey key)

getStdDev

public double getStdDev(FeatureKey key)

getMinValue

public double getMinValue(FeatureKey key)

getMaxValue

public double getMaxValue(FeatureKey key)

calcStats

protected void calcStats()

This method calls calcMean() and calcStdDev() as well, so they do not need to be called separately.

calcMeanAndMinMax

protected double calcMeanAndMinMax(FeatureKey featureKey)

calcStdDev

protected double calcStdDev(FeatureKey featureKey,
                            double mean)

getFeatureDependence

public FeatureDependence getFeatureDependence(FeatureKey primary)

getDependence

public double getDependence(FeatureKey primary,
                            FeatureKey other)

Dependence is not necessarily symmetric. This method returns the degree of effect that other has on primary. Dependence is measured from 0 (completely independent) to 1 (completely dependent).

getMostDependent

public java.util.HashSet getMostDependent(FeatureKey primary)

setDependencies

public void setDependencies(double mostDependentThreshold,
                            FeatureKey[] allKeys,
                            double[][] deps)

calcDependencies

public void calcDependencies(double mostDependentThreshold)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object