de.lmu.ifi.dbs.elki.math.linearalgebra.pca
Class NormalizingEigenPairFilter

java.lang.Object
  de.lmu.ifi.dbs.elki.math.linearalgebra.pca.NormalizingEigenPairFilter

All Implemented Interfaces:

EigenPairFilter, InspectionUtilFrequentlyScanned, Parameterizable

@Title(value="Perecentage based Eigenpair filter")
@Description(value="Normalizes all eigenpairs, consisting of eigenvalue e and eigenvector v such that  * e = 1, where <,> is the standard dot product.")
public class NormalizingEigenPairFilter
extends Object
implements EigenPairFilter

The NormalizingEigenPairFilter normalizes all eigenvectors s.t. * eigenvalue = 1, where <,> is the standard dot product

Field Summary

private static Logging

logger The logger for this class.

Constructor Summary

NormalizingEigenPairFilter()
Provides a new EigenPairFilter that normalizes all eigenvectors s.t.

Method Summary

FilteredEigenPairs	filter(SortedEigenPairs eigenPairs) Filters the specified eigenpairs into strong and weak eigenpairs, where strong eigenpairs having high variances and weak eigenpairs having small variances.
private void	normalizeEigenPair(EigenPair eigenPair) Normalizes an eigenpair consisting of eigenvector v and eigenvalue e s.t.

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final Logging logger

The logger for this class.

Constructor Detail

NormalizingEigenPairFilter

public NormalizingEigenPairFilter()

Provides a new EigenPairFilter that normalizes all eigenvectors s.t. eigenvalue * = 1, where <,> is the standard dot product

Method Detail

filter

public FilteredEigenPairs filter(SortedEigenPairs eigenPairs)

Description copied from interface: EigenPairFilter

Filters the specified eigenpairs into strong and weak eigenpairs, where strong eigenpairs having high variances and weak eigenpairs having small variances.

Specified by:

filter in interface EigenPairFilter

Parameters:

eigenPairs - the eigenPairs (i.e. the eigenvectors and

Returns:

the filtered eigenpairs

normalizeEigenPair

private void normalizeEigenPair(EigenPair eigenPair)

Normalizes an eigenpair consisting of eigenvector v and eigenvalue e s.t. * e = 1

Parameters:

eigenPair - the eigenpair to be normalized