dragon.matrix.factorize

Class NMF

java.lang.Object

dragon.matrix.factorize.AbstractFactorization

dragon.matrix.factorize.NMF

All Implemented Interfaces:

Factorization

public class NMF
extends AbstractFactorization

None negative matrix factorization

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields inherited from class dragon.matrix.factorize.AbstractFactorization

SMALL_QUANTITY

Constructor Summary

Constructors

Constructor and Description
NMF(int iterations)

Method Summary

Modifier and Type	Method and Description
void	factorize(SparseMatrix x, int dimension) Factorizes the given matrix
DoubleDenseMatrix	getLeftMatrix() Gets the left matrix
DoubleDenseMatrix	getMiddleMatrix() Gets the middle matrix
DoubleDenseMatrix	getRightMatrix() Gets the right matrix

Methods inherited from class dragon.matrix.factorize.AbstractFactorization

genPositiveMatrix, normalizeColumn, product, product, transpose

Methods inherited from class java.lang.Object

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

Constructor Detail

NMF

public NMF(int iterations)

Method Detail

factorize

public void factorize(SparseMatrix x,
                      int dimension)

Description copied from interface: Factorization

Factorizes the given matrix

Parameters:

x - the matrix for factorization

dimension - the number of dimensions for the middle matrix

getLeftMatrix

public DoubleDenseMatrix getLeftMatrix()

Description copied from interface: Factorization

Gets the left matrix

Returns:

the left matrix

getRightMatrix

public DoubleDenseMatrix getRightMatrix()

Description copied from interface: Factorization

Gets the right matrix

Returns:

the right matrix

getMiddleMatrix

public DoubleDenseMatrix getMiddleMatrix()

Description copied from interface: Factorization

Gets the middle matrix

Returns:

the middle matrix