de.lmu.ifi.dbs.elki.evaluation.classification.holdout

Class RandomizedCrossValidation

java.lang.Object

de.lmu.ifi.dbs.elki.evaluation.classification.holdout.AbstractHoldout

de.lmu.ifi.dbs.elki.evaluation.classification.holdout.RandomizedHoldout

de.lmu.ifi.dbs.elki.evaluation.classification.holdout.RandomizedCrossValidation

All Implemented Interfaces:

Holdout

public class RandomizedCrossValidation
extends RandomizedHoldout

RandomizedCrossValidationHoldout provides a set of partitions of a database to perform cross-validation. The test sets are not guaranteed to be disjoint.

Author:

Arthur Zimek

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RandomizedCrossValidation.Parameterizer Parameterization class

Field Summary

Fields

Modifier and Type	Field and Description
protected int	fold Holds the number of folds, current fold.
protected int	nfold Holds the number of folds, current fold.

Fields inherited from class de.lmu.ifi.dbs.elki.evaluation.classification.holdout.RandomizedHoldout

random

Fields inherited from class de.lmu.ifi.dbs.elki.evaluation.classification.holdout.AbstractHoldout

bundle, labelcol, labels

Constructor Summary

Constructors

Constructor and Description
RandomizedCrossValidation(RandomFactory random, int nfold) Constructor for n-fold cross-validation.

Method Summary

Methods

Modifier and Type	Method and Description
void	initialize(MultipleObjectsBundle bundle) Initialize the holdout procedure for a data set.
TrainingAndTestSet	nextPartitioning() Get the next partitioning of the given holdout.
int	numberOfPartitions() How many partitions to test.

Methods inherited from class de.lmu.ifi.dbs.elki.evaluation.classification.holdout.AbstractHoldout

allClassLabels, allClassLabels, findClassLabelColumn, getLabels

Methods inherited from class java.lang.Object

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

Field Detail

nfold

protected int nfold

Holds the number of folds, current fold.

fold

protected int fold

Holds the number of folds, current fold.

Constructor Detail

RandomizedCrossValidation

public RandomizedCrossValidation(RandomFactory random,
                         int nfold)

Constructor for n-fold cross-validation.

Parameters:

random - Random seed

nfold - Number of folds

Method Detail

initialize

public void initialize(MultipleObjectsBundle bundle)

Description copied from interface: Holdout

Initialize the holdout procedure for a data set.

Specified by:

initialize in interface Holdout

Overrides:

initialize in class AbstractHoldout

Parameters:

bundle - Data set bundle

numberOfPartitions

public int numberOfPartitions()

Description copied from interface: Holdout

How many partitions to test.

Returns:

Number of partitions.

nextPartitioning

public TrainingAndTestSet nextPartitioning()

Description copied from interface: Holdout

Get the next partitioning of the given holdout.

Returns:

Next partitioning of the data set