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

Class GlobalPrincipalComponentAnalysisTransform<O extends NumberVector<O,?>>

java.lang.Object

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

de.lmu.ifi.dbs.elki.datasource.filter.transform.GlobalPrincipalComponentAnalysisTransform<O>

Type Parameters:

O - Vector type

All Implemented Interfaces:

ObjectFilter, InspectionUtilFrequentlyScanned

public class GlobalPrincipalComponentAnalysisTransform<O extends NumberVector<O,?>>
extends AbstractConversionFilter<O,O>

Apply principal component analysis to the data set. TODO: add dimensionality reduction

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	GlobalPrincipalComponentAnalysisTransform.Parameterizer<O extends NumberVector<O,?>> Parameterization class.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) double[]	buf
(package private) CovarianceMatrix	covmat
(package private) int	dim
(package private) double[]	mean
(package private) double[][]	proj

Constructor Summary

Constructors

Constructor and Description
GlobalPrincipalComponentAnalysisTransform() Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected SimpleTypeInformation<? super O>	convertedType(SimpleTypeInformation<O> in) Get the output type from the input type after conversion.
protected O	filterSingleObject(O obj) Normalize a single instance.
protected SimpleTypeInformation<? super O>	getInputTypeRestriction() Get the input type restriction used for negotiating the data query.
protected void	prepareComplete() Complete the initialization phase
protected void	prepareProcessInstance(O obj) Process a single object during initialization.
protected boolean	prepareStart(SimpleTypeInformation<O> in) Return "true" when the normalization needs initialization (two-pass filtering!)

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

filter

Methods inherited from class java.lang.Object

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

Field Detail

dim

int dim

covmat

CovarianceMatrix covmat

proj

double[][] proj

buf

double[] buf

mean

double[] mean

Constructor Detail

GlobalPrincipalComponentAnalysisTransform

public GlobalPrincipalComponentAnalysisTransform()

Constructor.

Method Detail

prepareStart

protected boolean prepareStart(SimpleTypeInformation<O> in)

Description copied from class: AbstractConversionFilter

Return "true" when the normalization needs initialization (two-pass filtering!)

Overrides:

prepareStart in class AbstractConversionFilter<O extends NumberVector<O,?>,O extends NumberVector<O,?>>

Parameters:

in - Input type information

Returns:

true or false

prepareProcessInstance

protected void prepareProcessInstance(O obj)

Description copied from class: AbstractConversionFilter

Process a single object during initialization.

Overrides:

prepareProcessInstance in class AbstractConversionFilter<O extends NumberVector<O,?>,O extends NumberVector<O,?>>

Parameters:

obj - Object to process

prepareComplete

protected void prepareComplete()

Description copied from class: AbstractConversionFilter

Complete the initialization phase

Overrides:

prepareComplete in class AbstractConversionFilter<O extends NumberVector<O,?>,O extends NumberVector<O,?>>

filterSingleObject

protected O filterSingleObject(O obj)

Description copied from class: AbstractConversionFilter

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

Specified by:

filterSingleObject in class AbstractConversionFilter<O extends NumberVector<O,?>,O extends NumberVector<O,?>>

Parameters:

obj - Database object to normalize

Returns:

Normalized database object

getInputTypeRestriction

protected SimpleTypeInformation<? super O> getInputTypeRestriction()

Description copied from class: AbstractConversionFilter

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

Specified by:

getInputTypeRestriction in class AbstractConversionFilter<O extends NumberVector<O,?>,O extends NumberVector<O,?>>

Returns:

Type restriction

convertedType

protected SimpleTypeInformation<? super O> convertedType(SimpleTypeInformation<O> in)

Description copied from class: AbstractConversionFilter

Get the output type from the input type after conversion.

Specified by:

convertedType in class AbstractConversionFilter<O extends NumberVector<O,?>,O extends NumberVector<O,?>>

Parameters:

in - input type restriction

Returns:

output type restriction