edu.indiana.iucbrf.feature.stats
Class FeatureDependence

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

public class FeatureDependence
extends java.lang.Object

Maintains dependence information between a given feature and all others.

Field Summary

protected java.util.HashMap	allDeps
protected FeatureKey	key
protected java.util.HashSet	mostDependent

Constructor Summary

FeatureDependence(FeatureKey key, CaseBase cb, Domain domain, double mostDependentThreshold, FeatureStats featureStats)
Creates a new instance of FeatureDependence

FeatureDependence(FeatureKey key, FeatureKey[] allKeys, double[] deps, double mostDependentThreshold)

FeatureDependence(FeatureKey key, java.util.HashMap allDeps, double mostDependentThreshold)
Creates a new instance of FeatureDependence

Method Summary

double	calcCorrelation(FeatureKey feature1, FeatureKey feature2, CaseBase cb, FeatureStats featureStats)
double	calcDependence(FeatureKey feature1, FeatureKey feature2, CaseBase cb, FeatureStats featureStats) Dependence is not necessarily symmetric.
protected void	calcDependencies(FeatureKey key, CaseBase cb, Domain domain, double mostDependentThreshold, FeatureStats featureStats)
double	convertToStandardUnits(double value, double mean, double stdDev)
double	getDependence(FeatureKey other) Dependence is not necessarily symmetric.
java.util.HashSet	getMostDependent()
java.lang.String	toString()
java.lang.String	toString(Domain domain)

Methods inherited from class java.lang.Object

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

Field Detail

key

protected FeatureKey key

allDeps

protected java.util.HashMap allDeps

mostDependent

protected java.util.HashSet mostDependent

Constructor Detail

FeatureDependence

public FeatureDependence(FeatureKey key,
                         CaseBase cb,
                         Domain domain,
                         double mostDependentThreshold,
                         FeatureStats featureStats)

Creates a new instance of FeatureDependence

FeatureDependence

public FeatureDependence(FeatureKey key,
                         java.util.HashMap allDeps,
                         double mostDependentThreshold)

Creates a new instance of FeatureDependence

FeatureDependence

public FeatureDependence(FeatureKey key,
                         FeatureKey[] allKeys,
                         double[] deps,
                         double mostDependentThreshold)

Method Detail

getDependence

public double getDependence(FeatureKey other)

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

calcDependencies

protected void calcDependencies(FeatureKey key,
                                CaseBase cb,
                                Domain domain,
                                double mostDependentThreshold,
                                FeatureStats featureStats)

getMostDependent

public java.util.HashSet getMostDependent()

calcDependence

public double calcDependence(FeatureKey feature1,
                             FeatureKey feature2,
                             CaseBase cb,
                             FeatureStats featureStats)

Dependence is not necessarily symmetric. This method returns the degree of effect that other has on primary. Dependence is measured between 0 and 1.

calcCorrelation

public double calcCorrelation(FeatureKey feature1,
                              FeatureKey feature2,
                              CaseBase cb,
                              FeatureStats featureStats)

convertToStandardUnits

public double convertToStandardUnits(double value,
                                     double mean,
                                     double stdDev)

toString

public java.lang.String toString(Domain domain)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object