org.opensourcephysics.numerics
Class LUPDecomposition

java.lang.Object
  org.opensourcephysics.numerics.LUPDecomposition

public class LUPDecomposition
extends java.lang.Object

Lower Upper Permutation (LUP) decomposition See Object Oriented Implementation of Numerical Methods by Didier H. Besset.

Author:

Didier H. Besset

Constructor Summary

LUPDecomposition(double[][] components)
Constructor method

Method Summary

double	determinant() Gets the determinant.
double[][]	inverseMatrixComponents() Calculates the inverse matrix components.
double[]	solve(double[] c)
static void	symmetrizeComponents(double[][] components) Make sure the supplied matrix components are those of a symmetric matrix
java.lang.String	toString() Returns a String that represents the value of this object.

Methods inherited from class java.lang.Object

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

Constructor Detail

LUPDecomposition

public LUPDecomposition(double[][] components)
                 throws java.lang.IllegalArgumentException

Constructor method

Parameters:

components - double[][]

Throws:

java.lang.IllegalArgumentException

Method Detail

determinant

public double determinant()

Gets the determinant.

Returns:

double[]

inverseMatrixComponents

public double[][] inverseMatrixComponents()

Calculates the inverse matrix components.

Returns:

the matrix inverse or null if the inverse does not exist

symmetrizeComponents

public static void symmetrizeComponents(double[][] components)

Make sure the supplied matrix components are those of a symmetric matrix

Parameters:

components - double

solve

public double[] solve(double[] c)

Parameters:

c - double[]

Returns:

double[]

toString

public java.lang.String toString()

Returns a String that represents the value of this object.

Overrides:

toString in class java.lang.Object

Returns:

a string representation of the receiver