net.mumie.mathletfactory.math.number.numeric

Class MatrixMultiplikation

java.lang.Object

net.mumie.mathletfactory.math.number.numeric.MatrixMultiplikation

public class MatrixMultiplikation
extends java.lang.Object

Contains methods for the matrix multiplication of matrices given rowwise as an array of MNumber entries.

Author:

Mrose

Document status:

finished

Constructor Summary

Constructors

Constructor and Description
MatrixMultiplikation()

Method Summary

Methods

Modifier and Type	Method and Description
static MNumber[]	multinxm(MNumber[] A, MNumber[] B, int n, int m, int p) Multiplies an nxm-matrix A and an mxp-matrix B.
static MNumber[]	multinxn(MNumber[] A, MNumber[] B) Multiplies two nxn-matrices A and B.

Methods inherited from class java.lang.Object

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

Constructor Detail

MatrixMultiplikation

public MatrixMultiplikation()

Method Detail

multinxm

public static MNumber[] multinxm(MNumber[] A,
                 MNumber[] B,
                 int n,
                 int m,
                 int p)

Multiplies an nxm-matrix A and an mxp-matrix B. Result is an nxp-matrix. A and B have to be given rowwise. They remain unchanged.

Parameters:

A - a MNumber[] of length n*m

B - a MNumber[] of length m*p

n - an int

m - an int

p - an int

Returns:

a MNumber[] of length n*p

Throws:

java.lang.IllegalArgumentException - if the matrices have the wrong dimensions.

multinxn

public static MNumber[] multinxn(MNumber[] A,
                 MNumber[] B)

Multiplies two nxn-matrices A and B. Result is an nxn-matrix. A and B have to be given rowwise. They remain unchanged.

Parameters:

A - a MNumber[] of length n*n

B - a MNumber[] of length n*n

Returns:

a MNumber[] of length n*n

Throws:

java.lang.IllegalArgumentException - if the matrices have the wrong dimensions.