jvx.numeric
Class PnJacobi

java.lang.Object
  |
  +--jvx.numeric.PnJacobi

public class PnJacobi

extends java.lang.Object

Compute eigenvectors and eigenvalues of a given matrix and store in result vectors.

Version:

08.11.00, 2.20 revised (kp) Replace formatting with PuString rather than Fmt.
08.09.99, 2.10 revised (kp) Moved to project jv.numeric from jv.geom.
07.09.99, 2.00 revised (kp) ComputeEigenvectors() converted to static method.
00.00.98, 1.00 created (kp)

Author:

Konrad Polthier

Constructor Summary

PnJacobi()

Method Summary

static int	computeEigenvectors(PdMatrix mat, int dim, PdVector eValue, PdVector[] eVector) Compute eigenvectors and eigenvalues of a given matrix and store in result vectors.
static void	main(java.lang.String[] args)
static void	printEigenvalues(int dim, PdVector eValue)
static void	printEigenvectors(int dim, PdVector eValue, PdVector[] eVector)
static boolean	test(PdMatrix mat, int dim, PdVector eValue, PdVector[] eVector)
static boolean	testWayneExample(double a, double b, double c)

Methods inherited from class java.lang.Object

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

Constructor Detail

PnJacobi

public PnJacobi()

Method Detail

computeEigenvectors

public static int computeEigenvectors(PdMatrix mat,
                                      int dim,
                                      PdVector eValue,
                                      PdVector[] eVector)

Compute eigenvectors and eigenvalues of a given matrix and store in result vectors. Method modifies the original matrix for internal use.

Parameters:

mat - Matrix whose eigenvalues and -vectors should be computed.

dim - Size of square matrix, length of vectors

eValue - Vector to store the computed eigenvalues

eValue - Array of vectors to store the computed eigenvectors

Returns:

Number of used iterations.

printEigenvectors

public static void printEigenvectors(int dim,
                                     PdVector eValue,
                                     PdVector[] eVector)

printEigenvalues

public static void printEigenvalues(int dim,
                                    PdVector eValue)

test

public static boolean test(PdMatrix mat,
                           int dim,
                           PdVector eValue,
                           PdVector[] eVector)

testWayneExample

public static boolean testWayneExample(double a,
                                       double b,
                                       double c)

main

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