jmathlib.toolbox.jmathlib.matrix._private.Jampack
Class Norm

java.lang.Object
  jmathlib.toolbox.jmathlib.matrix._private.Jampack.Norm

public class Norm
extends java.lang.Object

Norm computes norms of matrices.

Comments: At this point only the Frobenius norm is calculated. Later the 1, 2, and infinity norms will be added.

Version:

Pre-alpha

Author:

G. W. Stewart

Constructor Summary

Norm()

Method Summary

static double	fro(Z1 u) Computes the Frobenius norm of a Z1.
static double	fro(Zdiagmat D) Computes the Frobenius norm of a Zdiagmat.
static double	fro(Zmat A) Computes the Frobenius norm of a Zmat.
static double	fro(Zmat A, int ii1, int ii2, int jj1, int jj2) Computes the Frobenius norm of a the submatrix (ii1:ii2, jj1,jj2) of a Zmat.

Methods inherited from class java.lang.Object

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

Constructor Detail

Norm

public Norm()

Method Detail

fro

public static double fro(Zmat A,
                         int ii1,
                         int ii2,
                         int jj1,
                         int jj2)

Computes the Frobenius norm of a the submatrix (ii1:ii2, jj1,jj2) of a Zmat.

Parameters:

A - The zmat

ii1 - The lower row index

ii2 - The upper row index

jj1 - The lower column index

jj2 - The upper column index

Returns:

The Frobenius norm of A(ii1:ii2, jj1:jj2)

fro

public static double fro(Zmat A)

Computes the Frobenius norm of a Zmat.

Parameters:

A - The Zmat

Returns:

The Frobenius norm of A

fro

public static double fro(Z1 u)

Computes the Frobenius norm of a Z1.

Parameters:

u - The Z1

Returns:

The Frobenius norm of u

fro

public static double fro(Zdiagmat D)

Computes the Frobenius norm of a Zdiagmat.

Parameters:

D - The Zdiagmat