de.lmu.ifi.dbs.elki.varianceanalysis
Class GlobalPCA<O extends RealVector<O,?>>

java.lang.Object
  de.lmu.ifi.dbs.elki.logging.AbstractLoggable
      de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizable
          de.lmu.ifi.dbs.elki.varianceanalysis.AbstractPCA
              de.lmu.ifi.dbs.elki.varianceanalysis.GlobalPCA<O>

All Implemented Interfaces:

Loggable, Parameterizable, PCA

public class GlobalPCA<O extends RealVector<O,?>>
extends AbstractPCA

Computes the principal components for vector objects of a given database.

Author:

Elke Achtert

Field Summary

private Matrix

covarianceMatrix Holds the covariance matrix.

Fields inherited from class de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizable

optionHandler

Fields inherited from class de.lmu.ifi.dbs.elki.logging.AbstractLoggable

debug

Constructor Summary

GlobalPCA()
Computes the principal components for vector objects of a given database.

Method Summary

Matrix	getCovarianceMatrix() Returns the covariance matrix.
void	run(Database<O> database) Computes the principal components for objects of the given database.
void	run(Matrix matrix) Computes the principal components for objects of the given matrix.

Methods inherited from class de.lmu.ifi.dbs.elki.varianceanalysis.AbstractPCA

determineEigenPairs, getAttributeSettings, getEigenvalues, getEigenvectors, getStrongEigenvalues, getStrongEigenvectors, getWeakEigenvalues, getWeakEigenvectors, setParameters

Methods inherited from class de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizable

addOption, checkGlobalParameterConstraints, deleteOption, description, description, description, getParameters, getParameterValue, getPossibleOptions, inlineDescription, isSet, setParameters

Methods inherited from class de.lmu.ifi.dbs.elki.logging.AbstractLoggable

debugFine, debugFiner, debugFinest, exception, message, progress, progress, progress, verbose, verbose, warning

Methods inherited from class java.lang.Object

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

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

checkGlobalParameterConstraints, description, getParameters, getPossibleOptions, inlineDescription

Field Detail

covarianceMatrix

private Matrix covarianceMatrix

Holds the covariance matrix.

Constructor Detail

GlobalPCA

public GlobalPCA()

Computes the principal components for vector objects of a given database.

Method Detail

run

public void run(Database<O> database)

Computes the principal components for objects of the given database.

Parameters:

database - the database containing the objects

run

public void run(Matrix matrix)

Computes the principal components for objects of the given matrix.

Parameters:

matrix - the matrix containing the objects as column vectors

getCovarianceMatrix

public Matrix getCovarianceMatrix()

Returns the covariance matrix.

Returns:

the covariance matrix