org.openimaj.ml.clustering.spectral

Class GraphLaplacian.Unnormalised

java.lang.Object

org.openimaj.ml.clustering.spectral.GraphLaplacian

org.openimaj.ml.clustering.spectral.GraphLaplacian.Unnormalised

Enclosing class:

GraphLaplacian

public static class GraphLaplacian.Unnormalised
extends GraphLaplacian

The symmetric normalised Laplacian is defined as: L = D - W

Author:

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

Nested Class Summary

Nested classes/interfaces inherited from class org.openimaj.ml.clustering.spectral.GraphLaplacian

GraphLaplacian.Normalised, GraphLaplacian.Unnormalised, GraphLaplacian.Warped

Constructor Summary

Constructors

Constructor and Description
Unnormalised()

Method Summary

Modifier and Type	Method and Description
ch.akuhn.matrix.SparseMatrix	laplacian(ch.akuhn.matrix.SparseMatrix adj, org.openimaj.math.matrix.DiagonalMatrix degree)

Methods inherited from class org.openimaj.ml.clustering.spectral.GraphLaplacian

eigenIterator, laplacian

Methods inherited from class java.lang.Object

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

Constructor Detail

Unnormalised

public Unnormalised()

Method Detail

laplacian

public ch.akuhn.matrix.SparseMatrix laplacian(ch.akuhn.matrix.SparseMatrix adj,
                                              org.openimaj.math.matrix.DiagonalMatrix degree)

Specified by:

laplacian in class GraphLaplacian

Parameters:

adj - square and symmetric

degree - the sum of the adjacency for a node in the diagonals

Returns:

the laplacian