woSource

Class NNLSSolver

java.lang.Object

woSource.NNLSSolver

public class NNLSSolver
extends java.lang.Object

This is a perfectly functional Java NNLS solver that utilizes JAMA for all the Matrix calculations. As such, one will need Jama (currently at: http://math.nist.gov/javanumerics/jama/) to use this program.

Author:

Josh Vermaas

Constructor Summary

Constructors

Constructor and Description
NNLSSolver()

Method Summary

Modifier and Type	Method and Description
static void	main(java.lang.String[] penguin) In case you want to test the solver, there is this handy-dandy testing function.
static Jama.Matrix	solveNNLS(Jama.Matrix A, double[] b)
static Jama.Matrix	solveNNLS(Jama.Matrix A, float[] b) Whee!!! This is my own Java implementation of the NNLS algorithm as described in: Lawson and Hanson, "Solving Least Squares Problems", Prentice-Hall, 1974, Chapter 23, p.
static Jama.Matrix	solveNNLS(Jama.Matrix A, Jama.Matrix b)

Methods inherited from class java.lang.Object

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

Constructor Detail

NNLSSolver

public NNLSSolver()

Method Detail

main

public static void main(java.lang.String[] penguin)

In case you want to test the solver, there is this handy-dandy testing function. Compare the results with your favorite NNLS solver, and they should be equivalent (or at least they were equivalent to MATLAB's...).

Parameters:

penguin - Not used.

solveNNLS

public static Jama.Matrix solveNNLS(Jama.Matrix A,
                                    float[] b)

Whee!!! This is my own Java implementation of the NNLS algorithm as described in: Lawson and Hanson, "Solving Least Squares Problems", Prentice-Hall, 1974, Chapter 23, p. 161. It not only solves the least squares problem, but does so while also requiring that none of the answers be negative.

Parameters:

A - The A in Ax=b

b - The b in Ax=b

Returns:

The x in Ax=b

solveNNLS

public static Jama.Matrix solveNNLS(Jama.Matrix A,
                                    double[] b)

solveNNLS

public static Jama.Matrix solveNNLS(Jama.Matrix A,
                                    Jama.Matrix b)