weka.classifiers.trees.adtree

Class ReferenceInstances

java.lang.Object

weka.core.Instances

weka.classifiers.trees.adtree.ReferenceInstances

All Implemented Interfaces:

java.io.Serializable, RevisionHandler

public class ReferenceInstances
extends Instances

Simple class that extends the Instances class making it possible to create subsets of instances that reference their source set. Is used by ADTree to make reweighting of instances easy to manage.

Version:

$Revision: 1.5 $

Author:

Richard Kirkby (rkirkby@cs.waikato.ac.nz)

See Also:

Serialized Form

Field Summary

Fields inherited from class weka.core.Instances

ARFF_DATA, ARFF_RELATION, FILE_EXTENSION, SERIALIZED_OBJ_FILE_EXTENSION

Constructor Summary

Constructors

Constructor and Description
ReferenceInstances(Instances dataset, int capacity) Creates an empty set of instances.

Method Summary

Modifier and Type	Method and Description
void	addReference(Instance instance) Adds one instance reference to the end of the set.
java.lang.String	getRevision() Returns the revision string.

Methods inherited from class weka.core.Instances

add, attribute, attribute, attributeStats, attributeToDoubleArray, checkForAttributeType, checkForStringAttributes, checkInstance, classAttribute, classIndex, compactify, delete, delete, deleteAttributeAt, deleteAttributeType, deleteStringAttributes, deleteWithMissing, deleteWithMissing, deleteWithMissingClass, enumerateAttributes, enumerateInstances, equalHeaders, firstInstance, getRandomNumberGenerator, insertAttributeAt, instance, kthSmallestValue, kthSmallestValue, lastInstance, main, meanOrMode, meanOrMode, mergeInstances, numAttributes, numClasses, numDistinctValues, numDistinctValues, numInstances, randomize, readInstance, relationName, renameAttribute, renameAttribute, renameAttributeValue, renameAttributeValue, resample, resampleWithWeights, resampleWithWeights, resampleWithWeights, resampleWithWeights, setClass, setClassIndex, setRelationName, sort, sort, stratify, stringFreeStructure, sumOfWeights, swap, test, testCV, toString, toSummaryString, trainCV, trainCV, variance, variance

Methods inherited from class java.lang.Object

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

Constructor Detail

ReferenceInstances

public ReferenceInstances(Instances dataset,
                          int capacity)

Creates an empty set of instances.

Parameters:

dataset - the instances to get the header information from

capacity - the initial storage capacity of the set

Method Detail

addReference

public final void addReference(Instance instance)

Adds one instance reference to the end of the set. Does not copy instance before it is added. Increases the size of the dataset if it is not large enough. Does not check if the instance is compatible with the dataset.

Parameters:

instance - the instance to be added

getRevision

public java.lang.String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Overrides:

getRevision in class Instances

Returns:

the revision