Package moa.classifiers.core.conditionaltests

Class NominalAttributeMultiwayTest

java.lang.Object

moa.AbstractMOAObject

moa.classifiers.core.conditionaltests.InstanceConditionalTest

moa.classifiers.core.conditionaltests.NominalAttributeMultiwayTest

All Implemented Interfaces:

java.io.Serializable, MOAObject

Direct Known Subclasses:

IademNominalAttributeMultiwayTest

public class NominalAttributeMultiwayTest
extends InstanceConditionalTest

Nominal multi way conditional test for instances to use to split nodes in Hoeffding trees.

Version:

$Revision: 7 $

Author:

Richard Kirkby ([email protected])

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected int	attIndex

Constructor Summary

Constructors

Constructor	Description
NominalAttributeMultiwayTest(int attIndex)

Method Summary

Modifier and Type	Method	Description
int	branchForInstance(Instance inst)	Returns the number of the branch for an instance, -1 if unknown.
java.lang.String	describeConditionForBranch(int branch, InstancesHeader context)	Gets the text that describes the condition of a branch.
int[]	getAttsTestDependsOn()	Returns an array with the attributes that the test depends on.
void	getDescription(java.lang.StringBuilder sb, int indent)	Returns a string representation of this object.
int	maxBranches()	Gets the number of maximum branches, -1 if unknown.

Methods inherited from class moa.AbstractMOAObject

copy, copy, measureByteSize, measureByteSize, toString

Methods inherited from class moa.classifiers.core.conditionaltests.InstanceConditionalTest

resultKnownForInstance

Methods inherited from class java.lang.Object

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

Field Detail

attIndex

protected int attIndex

Constructor Detail

NominalAttributeMultiwayTest

public NominalAttributeMultiwayTest(int attIndex)

Method Detail

branchForInstance

public int branchForInstance(Instance inst)

Description copied from class: InstanceConditionalTest

Returns the number of the branch for an instance, -1 if unknown.

Specified by:

branchForInstance in class InstanceConditionalTest

Parameters:

inst - the instance to be used

Returns:

the number of the branch for an instance, -1 if unknown.

describeConditionForBranch

public java.lang.String describeConditionForBranch(int branch,
                                                   InstancesHeader context)

Description copied from class: InstanceConditionalTest

Gets the text that describes the condition of a branch. It is used to describe the branch.

Specified by:

describeConditionForBranch in class InstanceConditionalTest

Parameters:

branch - the number of the branch to describe

context - the context or header of the data stream

Returns:

the text that describes the condition of the branch

maxBranches

public int maxBranches()

Description copied from class: InstanceConditionalTest

Gets the number of maximum branches, -1 if unknown.

Specified by:

maxBranches in class InstanceConditionalTest

Returns:

the number of maximum branches, -1 if unknown..

getDescription

public void getDescription(java.lang.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.

Parameters:

sb - the stringbuilder to add the description

indent - the number of characters to indent

getAttsTestDependsOn

public int[] getAttsTestDependsOn()

Description copied from class: InstanceConditionalTest

Returns an array with the attributes that the test depends on.

Specified by:

getAttsTestDependsOn in class InstanceConditionalTest

Returns:

an array with the attributes that the test depends on