Package 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.

Constructor Summary

Constructors

Constructor	Description
LUPDecomposition(double[][] components)	Constructor method

Method Summary

Modifier and Type	Method	Description
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