de.lmu.ifi.dbs.elki.varianceanalysis
Interface PCA

All Superinterfaces:

Parameterizable

All Known Implementing Classes:

AbstractPCA, GlobalPCA, LinearLocalPCA, LocalKernelPCA, LocalPCA

public interface PCA
extends Parameterizable

A PCA is a principal component analysis that belongs to an object stored in a database. The PCA determines the principal components of the object and holds the eigenvectors and eigenvalues of the object.

Author:

Elke Achtert

Method Summary

double[]	getEigenvalues() Returns a copy of the eigenvalues of the object to which this PCA belongs to in decreasing order.
Matrix	getEigenvectors() Returns a copy of the matrix of eigenvectors of the object to which this PCA belongs to.
double[]	getStrongEigenvalues() Returns a copy of the strong eigenvalues of the object after passing the eigen pair filter.
Matrix	getStrongEigenvectors() Returns a copy of the matrix of strong eigenvectors after passing the eigen pair filter.
double[]	getWeakEigenvalues() Returns a copy of the weak eigenvalues of the object after passing the eigen pair filter.
Matrix	getWeakEigenvectors() Returns a copy of the matrix of weak eigenvectors after passing the eigen pair filter.

Methods inherited from interface de.lmu.ifi.dbs.elki.utilities.optionhandling.Parameterizable

checkGlobalParameterConstraints, description, getAttributeSettings, getParameters, getPossibleOptions, inlineDescription, setParameters

Method Detail

getEigenvectors

Matrix getEigenvectors()

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

Returns:

the matrix of eigenvectors

getEigenvalues

double[] getEigenvalues()

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

Returns:

the eigenvalues

getStrongEigenvectors

Matrix getStrongEigenvectors()

Returns a copy of the matrix of strong eigenvectors after passing the eigen pair filter.

Returns:

the matrix of eigenvectors

getStrongEigenvalues

double[] getStrongEigenvalues()

Returns a copy of the strong eigenvalues of the object after passing the eigen pair filter.

Returns:

the eigenvalues

getWeakEigenvectors

Matrix getWeakEigenvectors()

Returns a copy of the matrix of weak eigenvectors after passing the eigen pair filter.

Returns:

the matrix of eigenvectors

getWeakEigenvalues

double[] getWeakEigenvalues()

Returns a copy of the weak eigenvalues of the object after passing the eigen pair filter.

Returns:

the eigenvalues