org.openimaj.ml.clustering.spectral

Class AbsoluteValueEigenChooser

java.lang.Object

org.openimaj.ml.clustering.spectral.EigenChooser

org.openimaj.ml.clustering.spectral.AbsoluteValueEigenChooser

public class AbsoluteValueEigenChooser
extends EigenChooser

Attempts to automatically choose the number of eigen vectors based on the comparative value of the eigen value with the first eigen value seen.

Author:

Sina Samangooei (ss@ecs.soton.ac.uk)

Constructor Summary

Constructors

Constructor and Description
AbsoluteValueEigenChooser(double absoluteGap, double maxSelect)

Method Summary

Modifier and Type	Method and Description
int	nEigenVectors(Iterator<DoubleObjectPair<Vector>> vals, int totalEigenVectors)
FewEigenvalues	prepare(SparseMatrix laplacian) Make a coarse decision of the number of eigen vectors to extract in the first place with the knowledge of the eigen values that will likely be important
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

AbsoluteValueEigenChooser

public AbsoluteValueEigenChooser(double absoluteGap,
                                 double maxSelect)

Parameters:

absoluteGap - the gap between the first and the current value

maxSelect -

Method Detail

nEigenVectors

public int nEigenVectors(Iterator<DoubleObjectPair<Vector>> vals,
                         int totalEigenVectors)

Specified by:

nEigenVectors in class EigenChooser

totalEigenVectors - the total number of eigen vectors

Returns:

count the eigen vectors

prepare

public FewEigenvalues prepare(SparseMatrix laplacian)

Description copied from class: EigenChooser

Make a coarse decision of the number of eigen vectors to extract in the first place with the knowledge of the eigen values that will likely be important

Specified by:

prepare in class EigenChooser

Parameters:

laplacian - the matrix to be decomposed

Returns:

the prepared eigen values

toString

public String toString()

Overrides:

toString in class Object