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

Class PCAResult

java.lang.Object

de.lmu.ifi.dbs.elki.math.linearalgebra.pca.PCAResult

Direct Known Subclasses:

PCAFilteredResult

public class PCAResult
extends Object

Result class for Principal Component Analysis with some convenience methods

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
private SortedEigenPairs	eigenPairs The eigenpairs in decreasing order.
private double[]	eigenvalues The eigenvalues in decreasing order.
private Matrix	eigenvectors The eigenvectors in decreasing order to their corresponding eigenvalues.

Constructor Summary

Constructors

Constructor and Description
PCAResult(double[] eigenvalues, Matrix eigenvectors, SortedEigenPairs eigenPairs) Build a PCA result object.
PCAResult(SortedEigenPairs eigenPairs) Build a PCA result from an existing set of EigenPairs.

Method Summary

Methods

Modifier and Type	Method and Description
SortedEigenPairs	getEigenPairs() Returns the eigenpairs of the object to which this PCA belongs to in decreasing order.
double[]	getEigenvalues() Returns the eigenvalues of the object to which this PCA belongs to in decreasing order.
Matrix	getEigenvectors() Returns the matrix of eigenvectors of the object to which this PCA belongs to.
int	length() Returns the number of eigenvectors stored

Methods inherited from class java.lang.Object

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

Field Detail

eigenPairs

private SortedEigenPairs eigenPairs

The eigenpairs in decreasing order.

eigenvalues

private double[] eigenvalues

The eigenvalues in decreasing order.

eigenvectors

private Matrix eigenvectors

The eigenvectors in decreasing order to their corresponding eigenvalues.

Constructor Detail

PCAResult

public PCAResult(double[] eigenvalues,
         Matrix eigenvectors,
         SortedEigenPairs eigenPairs)

Build a PCA result object.

Parameters:

eigenvalues - Eigenvalues

eigenvectors - Eigenvector matrix

eigenPairs - Eigenpairs

PCAResult

public PCAResult(SortedEigenPairs eigenPairs)

Build a PCA result from an existing set of EigenPairs.

Parameters:

eigenPairs - existing eigenpairs

Method Detail

getEigenvectors

public final Matrix getEigenvectors()

Returns the matrix of eigenvectors of the object to which this PCA belongs to.

Returns:

the matrix of eigenvectors

getEigenvalues

public final double[] getEigenvalues()

Returns the eigenvalues of the object to which this PCA belongs to in decreasing order.

Returns:

the eigenvalues

getEigenPairs

public final SortedEigenPairs getEigenPairs()

Returns the eigenpairs of the object to which this PCA belongs to in decreasing order.

Returns:

the eigenpairs

length

public final int length()

Returns the number of eigenvectors stored

Returns:

length