moa.classifiers.core.attributeclassobservers

Class FIMTDDNumericAttributeClassObserver

java.lang.Object

moa.AbstractMOAObject

moa.options.AbstractOptionHandler

moa.classifiers.core.attributeclassobservers.BinaryTreeNumericAttributeClassObserver

moa.classifiers.core.attributeclassobservers.FIMTDDNumericAttributeClassObserver

All Implemented Interfaces:

Serializable, AttributeClassObserver, NumericAttributeClassObserver, MOAObject, OptionHandler

Direct Known Subclasses:

FIMTDDNumericAttributeClassLimitObserver

public class FIMTDDNumericAttributeClassObserver
extends BinaryTreeNumericAttributeClassObserver
implements NumericAttributeClassObserver

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	FIMTDDNumericAttributeClassObserver.Node

Field Summary

Fields

Modifier and Type	Field and Description
protected FIMTDDNumericAttributeClassObserver.Node	root

Fields inherited from class moa.options.AbstractOptionHandler

classOptionNamesToPreparedObjects, options

Constructor Summary

Constructors

Constructor and Description
FIMTDDNumericAttributeClassObserver()

Method Summary

Methods

Modifier and Type	Method and Description
AttributeSplitSuggestion	getBestEvaluatedSplitSuggestion(SplitCriterion criterion, double[] preSplitDist, int attIndex, boolean binaryOnly) Gets the best split suggestion given a criterion and a class distribution
void	getDescription(StringBuilder sb, int indent) Returns a string representation of this object.
void	observeAttributeClass(double attVal, double classVal, double weight)
protected void	prepareForUseImpl(TaskMonitor monitor, ObjectRepository repository) This method describes the implementation of how to prepare this object for use.
double	probabilityOfAttributeValueGivenClass(double attVal, int classVal) Gets the probability for an attribute value given a class
void	removeBadSplits(SplitCriterion criterion, double lastCheckRatio, double lastCheckSDR, double lastCheckE) A method to remove all nodes in the E-BST in which it and all it's children represent 'bad' split points
protected AttributeSplitSuggestion	searchForBestSplitOption(FIMTDDNumericAttributeClassObserver.Node currentNode, AttributeSplitSuggestion currentBestOption, SplitCriterion criterion, int attIndex) Implementation of the FindBestSplit algorithm from E.Ikonomovska et al.

Methods inherited from class moa.classifiers.core.attributeclassobservers.BinaryTreeNumericAttributeClassObserver

observeAttributeClass, observeAttributeTarget, searchForBestSplitOption

Methods inherited from class moa.options.AbstractOptionHandler

copy, discoverOptionsViaReflection, getCLICreationString, getOptions, getPreparedClassOption, getPreparedClassOption, getPurposeString, prepareClassOptions, prepareForUse, prepareForUse

Methods inherited from class moa.AbstractMOAObject

copy, measureByteSize, measureByteSize, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface moa.classifiers.core.attributeclassobservers.AttributeClassObserver

observeAttributeClass, observeAttributeTarget

Methods inherited from interface moa.options.OptionHandler

copy, getCLICreationString, getOptions, getPurposeString, prepareForUse, prepareForUse

Methods inherited from interface moa.MOAObject

measureByteSize

Field Detail

root

protected FIMTDDNumericAttributeClassObserver.Node root

Constructor Detail

FIMTDDNumericAttributeClassObserver

public FIMTDDNumericAttributeClassObserver()

Method Detail

observeAttributeClass

public void observeAttributeClass(double attVal,
                         double classVal,
                         double weight)

probabilityOfAttributeValueGivenClass

public double probabilityOfAttributeValueGivenClass(double attVal,
                                           int classVal)

Description copied from interface: AttributeClassObserver

Gets the probability for an attribute value given a class

Specified by:

probabilityOfAttributeValueGivenClass in interface AttributeClassObserver

Overrides:

probabilityOfAttributeValueGivenClass in class BinaryTreeNumericAttributeClassObserver

Parameters:

attVal - the attribute value

classVal - the class

Returns:

probability for an attribute value given a class

getBestEvaluatedSplitSuggestion

public AttributeSplitSuggestion getBestEvaluatedSplitSuggestion(SplitCriterion criterion,
                                                       double[] preSplitDist,
                                                       int attIndex,
                                                       boolean binaryOnly)

Description copied from interface: AttributeClassObserver

Gets the best split suggestion given a criterion and a class distribution

Specified by:

getBestEvaluatedSplitSuggestion in interface AttributeClassObserver

Overrides:

getBestEvaluatedSplitSuggestion in class BinaryTreeNumericAttributeClassObserver

Parameters:

criterion - the split criterion to use

preSplitDist - the class distribution before the split

attIndex - the attribute index

binaryOnly - true to use binary splits

Returns:

suggestion of best attribute split

searchForBestSplitOption

protected AttributeSplitSuggestion searchForBestSplitOption(FIMTDDNumericAttributeClassObserver.Node currentNode,
                                                AttributeSplitSuggestion currentBestOption,
                                                SplitCriterion criterion,
                                                int attIndex)

Implementation of the FindBestSplit algorithm from E.Ikonomovska et al.

removeBadSplits

public void removeBadSplits(SplitCriterion criterion,
                   double lastCheckRatio,
                   double lastCheckSDR,
                   double lastCheckE)

A method to remove all nodes in the E-BST in which it and all it's children represent 'bad' split points

getDescription

public void getDescription(StringBuilder sb,
                  int indent)

Description copied from interface: MOAObject

Returns a string representation of this object. Used in AbstractMOAObject.toString to give a string representation of the object.

Specified by:

getDescription in interface MOAObject

Overrides:

getDescription in class BinaryTreeNumericAttributeClassObserver

Parameters:

sb - the stringbuilder to add the description

indent - the number of characters to indent

prepareForUseImpl

protected void prepareForUseImpl(TaskMonitor monitor,
                     ObjectRepository repository)

Description copied from class: AbstractOptionHandler

This method describes the implementation of how to prepare this object for use. All classes that extends this class have to implement prepareForUseImpl and not prepareForUse since prepareForUse calls prepareForUseImpl.

Overrides:

prepareForUseImpl in class BinaryTreeNumericAttributeClassObserver

Parameters:

monitor - the TaskMonitor to use

repository - the ObjectRepository to use