edu.udo.cs.yale.operator.features.transformation
Class PCAModel

java.lang.Object
  edu.udo.cs.yale.operator.AbstractIOObject
      edu.udo.cs.yale.operator.ResultObjectAdapter
          edu.udo.cs.yale.operator.AbstractModel
              edu.udo.cs.yale.operator.IOModel
                  edu.udo.cs.yale.operator.features.transformation.PCAModel

All Implemented Interfaces:

ComponentWeightsCreatable, IOObject, Model, ResultObject, Saveable, java.awt.event.ActionListener, java.awt.event.ItemListener, java.util.EventListener

public class PCAModel
extends IOModel
implements java.awt.event.ActionListener, java.awt.event.ItemListener, ComponentWeightsCreatable

This is the transformation model of the principal components analysis. The number of components is initially specified by the PCA. Additionally you can specify the number of components in the ModelApplier. You can add two prediction parameter:

• variance_threshold double Specify a new threshold for the cumulative variance of the principal components.
• nr_components integer Specify a lower number of components
• keep_attributes true|false If true, the original features are not removed.

Version:

$Id: PCAModel.java,v 1.14 2006/09/30 00:05:31 ingomierswa Exp $

Author:

Daniel Hakenjos

See Also:

PCA

Field Summary

private int[]	att_index
private java.lang.String[]	attname
private double[]	cumvariance
(package private) javax.swing.JRadioButton	cumvariance_plot
(package private) javax.swing.JRadioButton	eigenvalue_table
private double[]	eigenvalues
(package private) javax.swing.JRadioButton	eigenvector_table
private double[][]	eigenvectors
private boolean	keep_attributes
private int	last_selected_index
private boolean	manual_number
private double[]	mean
private int	nr_components
private double[][]	sorted_eigenvectors
private int	sortindex
private double	variance_threshold
private java.awt.Component[]	viscomp
private javax.swing.JPanel	vispanel

Constructor Summary

PCAModel()

PCAModel(ExampleSet eSet, double[] eigenvalues, double[][] eigenvectors)

Method Summary

void	actionPerformed(java.awt.event.ActionEvent arg0)
void	apply(ExampleSet eSet) Applies the model on the given example set.
private void	calculateCumulativeVariance() Calculates the cumulative variance.
java.lang.String[]	getAttributeNames()
double[]	getEigenvalues()
private java.awt.Component	getEigenvalueTable()
double[][]	getEigenvectors()
private java.awt.Component	getEigenvectorTable()
double[]	getMean()
double	getNrOfComponents()
private javax.swing.JComponent	getVariancePlot()
double	getVarianceThreshold()
java.awt.Component	getVisualisationComponent(IOContainer container) Returns a label that displays the ResultObjectAdapter.toResultString() result encoded as html.
AttributeWeights	getWeightsOfComponent(int component)
private void	initSortedEigenvectors()
void	itemStateChanged(java.awt.event.ItemEvent event)
private void	quickSort(double[] array, int links, int rechts) Order the subarry from index anfang to index ende with QuickSort
private void	quickSort2(double[][] array, int index, int links, int rechts) Order the subarry from index anfang to index ende with QuickSort
void	readData(java.io.ObjectInputStream in) Reads the model data from the stream.
void	setNrOfComponents(int nr_components)
void	setParameter(java.lang.String name, java.lang.Object object) Throws a UserError since most models should not allow additional parameters during application.
void	setVarianceThreshold(double threshold)
void	writeData(java.io.ObjectOutputStream out) Writes the model to a stream.

Methods inherited from class edu.udo.cs.yale.operator.AbstractModel

equals, getExtension, getFileDescription, readModel, readModel, save, writeModel, writeModel

Methods inherited from class edu.udo.cs.yale.operator.ResultObjectAdapter

addAction, getActions, getName, toHTML, toResultString

Methods inherited from class edu.udo.cs.yale.operator.AbstractIOObject

copy, read, read, read, write, write

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.udo.cs.yale.operator.ResultObject

getActions, getName, toResultString

Methods inherited from interface edu.udo.cs.yale.operator.IOObject

copy, write, write

Field Detail

mean

private double[] mean

attname

private java.lang.String[] attname

eigenvalues

private double[] eigenvalues

eigenvectors

private double[][] eigenvectors

manual_number

private boolean manual_number

nr_components

private int nr_components

variance_threshold

private double variance_threshold

cumvariance

private double[] cumvariance

viscomp

private java.awt.Component[] viscomp

vispanel

private javax.swing.JPanel vispanel

eigenvalue_table

javax.swing.JRadioButton eigenvalue_table

eigenvector_table

javax.swing.JRadioButton eigenvector_table

cumvariance_plot

javax.swing.JRadioButton cumvariance_plot

last_selected_index

private int last_selected_index

att_index

private int[] att_index

sorted_eigenvectors

private double[][] sorted_eigenvectors

sortindex

private int sortindex

keep_attributes

private boolean keep_attributes

Constructor Detail

PCAModel

public PCAModel()

PCAModel

public PCAModel(ExampleSet eSet,
                double[] eigenvalues,
                double[][] eigenvectors)

Method Detail

getAttributeNames

public java.lang.String[] getAttributeNames()

getMean

public double[] getMean()

getEigenvalues

public double[] getEigenvalues()

getEigenvectors

public double[][] getEigenvectors()

getVarianceThreshold

public double getVarianceThreshold()

getNrOfComponents

public double getNrOfComponents()

setVarianceThreshold

public void setVarianceThreshold(double threshold)

setNrOfComponents

public void setNrOfComponents(int nr_components)

apply

public void apply(ExampleSet eSet)
           throws OperatorException

Description copied from interface: Model

Applies the model on the given example set.

Specified by:

apply in interface Model

Throws:

OperatorException

calculateCumulativeVariance

private void calculateCumulativeVariance()

Calculates the cumulative variance.

quickSort

private void quickSort(double[] array,
                       int links,
                       int rechts)

Order the subarry from index anfang to index ende with QuickSort

Parameters:

array -

links -

rechts -

writeData

public void writeData(java.io.ObjectOutputStream out)
               throws java.io.IOException

Description copied from class: AbstractModel

Writes the model to a stream.

Specified by:

writeData in class AbstractModel

Throws:

java.io.IOException

readData

public void readData(java.io.ObjectInputStream in)
              throws java.io.IOException

Description copied from class: IOModel

Reads the model data from the stream.

Specified by:

readData in class IOModel

Throws:

java.io.IOException

setParameter

public void setParameter(java.lang.String name,
                         java.lang.Object object)
                  throws OperatorException

Description copied from class: AbstractModel

Throws a UserError since most models should not allow additional parameters during application. However, subclasses may overwrite this method.

Specified by:

setParameter in interface Model

Overrides:

setParameter in class AbstractModel

Throws:

OperatorException

getEigenvalueTable

private java.awt.Component getEigenvalueTable()

getEigenvectorTable

private java.awt.Component getEigenvectorTable()

getVariancePlot

private javax.swing.JComponent getVariancePlot()

getVisualisationComponent

public java.awt.Component getVisualisationComponent(IOContainer container)

Description copied from class: ResultObjectAdapter

Returns a label that displays the ResultObjectAdapter.toResultString() result encoded as html. Please note that the returned label is already enclosed by a scroll pane. If you overwrite this method you should again ensure that the returned component is scrollable. The given container is totally ignored.

Specified by:

getVisualisationComponent in interface ResultObject

Overrides:

getVisualisationComponent in class ResultObjectAdapter

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent arg0)

Specified by:

actionPerformed in interface java.awt.event.ActionListener

itemStateChanged

public void itemStateChanged(java.awt.event.ItemEvent event)

Specified by:

itemStateChanged in interface java.awt.event.ItemListener

quickSort2

private void quickSort2(double[][] array,
                        int index,
                        int links,
                        int rechts)

Order the subarry from index anfang to index ende with QuickSort

Parameters:

array -

links -

rechts -

initSortedEigenvectors

private void initSortedEigenvectors()

getWeightsOfComponent

public AttributeWeights getWeightsOfComponent(int component)
                                       throws OperatorException

Specified by:

getWeightsOfComponent in interface ComponentWeightsCreatable

Throws:

OperatorException