de.lmu.ifi.dbs.elki.datasource.filter.normalization.instancewise

Class InstanceMinMaxNormalization<V extends NumberVector>

java.lang.Object

de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamConversionFilter<I,O>

de.lmu.ifi.dbs.elki.datasource.filter.AbstractVectorStreamConversionFilter<V,V>

de.lmu.ifi.dbs.elki.datasource.filter.normalization.AbstractStreamNormalization<V>

de.lmu.ifi.dbs.elki.datasource.filter.normalization.instancewise.InstanceMinMaxNormalization<V>

Type Parameters:

V - vector type

All Implemented Interfaces:

BundleStreamSource, Normalization<V>, ObjectFilter, StreamFilter

public class InstanceMinMaxNormalization<V extends NumberVector>
extends AbstractStreamNormalization<V>

Normalize vectors such that the smallest attribute is 0, the largest is 1.

Since:

0.7.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	InstanceMinMaxNormalization.Parameterizer<V extends NumberVector> Parameterization class.

Nested classes/interfaces inherited from interface de.lmu.ifi.dbs.elki.datasource.bundle.BundleStreamSource

BundleStreamSource.Event

Field Summary

Fields

Modifier and Type	Field and Description
private double	max Minimum and maximum values.
private double	min Minimum and maximum values.
private int	multiplicity Multiplicity of the vector.

Fields inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractVectorStreamConversionFilter

factory

Fields inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

source

Constructor Summary

Constructors

Constructor and Description
InstanceMinMaxNormalization() Constructor, normalizing to [0;1]
InstanceMinMaxNormalization(double min, double max) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected V	filterSingleObject(V featureVector) Normalize a single instance.
protected SimpleTypeInformation<? super V>	getInputTypeRestriction() Get the input type restriction used for negotiating the data query.
protected void	initializeOutputType(SimpleTypeInformation<V> type) Initialize factory from a data type.

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.normalization.AbstractStreamNormalization

convertedType, restore, toString, transform

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamConversionFilter

data, getMeta, nextEvent

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

asMultipleObjectsBundle, assignDBID, filter, hasDBIDs, init

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.datasource.filter.ObjectFilter

filter

Field Detail

min

private double min

Minimum and maximum values.

max

private double max

Minimum and maximum values.

multiplicity

private int multiplicity

Multiplicity of the vector.

Constructor Detail

InstanceMinMaxNormalization

public InstanceMinMaxNormalization(double min,
                           double max)

Constructor.

Parameters:

min - Desired minimum value

max - Desired maximum value

InstanceMinMaxNormalization

public InstanceMinMaxNormalization()

Constructor, normalizing to [0;1]

Method Detail

filterSingleObject

protected V filterSingleObject(V featureVector)

Description copied from class: AbstractStreamConversionFilter

Normalize a single instance. You can implement this as UnsupportedOperationException if you override both public "normalize" functions!

Specified by:

filterSingleObject in class AbstractStreamConversionFilter<V extends NumberVector,V extends NumberVector>

Parameters:

featureVector - Database object to normalize

Returns:

Normalized database object

initializeOutputType

protected void initializeOutputType(SimpleTypeInformation<V> type)

Description copied from class: AbstractVectorStreamConversionFilter

Initialize factory from a data type.

Overrides:

initializeOutputType in class AbstractVectorStreamConversionFilter<V extends NumberVector,V extends NumberVector>

Parameters:

type - Output data type information.

getInputTypeRestriction

protected SimpleTypeInformation<? super V> getInputTypeRestriction()

Description copied from class: AbstractStreamConversionFilter

Get the input type restriction used for negotiating the data query.

Specified by:

getInputTypeRestriction in class AbstractStreamConversionFilter<V extends NumberVector,V extends NumberVector>

Returns:

Type restriction