Opus5
Class DenseMatrix

java.lang.Object
  |
  +--Opus5.DenseMatrix

All Implemented Interfaces:

Matrix

public class DenseMatrix

extends java.lang.Object

implements Matrix

Dense matrix implemented using a two-dimensional array.

Version:

$Id: DenseMatrix.java,v 3.2 2000/03/26 14:53:34 brpreiss Exp $

Author:

Bruno R. Preiss, P.Eng.

Field Summary

protected double[][]	array Two-dimensional array.
protected int	numberOfColumns Number of columns.
protected int	numberOfRows Number of rows.

Fields inherited from interface Opus5.Matrix

copyright

Constructor Summary

DenseMatrix(int numberOfRows, int numberOfColumns)
Constructs a DenseMatrixAsArray with the specified dimensions.

Method Summary

double	get(int i, int j) Returns the value in this matrix at the specified position.
Matrix	plus(Matrix mat) Returns the sum of this matrix and the specified matrix.
void	put(int i, int j, double d) Stores the specified value in this matrix at the specified position.
Matrix	times(Matrix mat) Returns the product of this matrix and the specified matrix.
Matrix	transpose() Returns the transpose of this matrix.

Methods inherited from class java.lang.Object

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

Field Detail

numberOfRows

protected int numberOfRows

Number of rows.

numberOfColumns

protected int numberOfColumns

Number of columns.

array

protected double[][] array

Two-dimensional array.

Constructor Detail

DenseMatrix

public DenseMatrix(int numberOfRows,
                   int numberOfColumns)

Constructs a DenseMatrixAsArray with the specified dimensions.

Parameters:

numberOfRows - The number of rows.

numberOfColumns - The number of columns.

Method Detail

get

public double get(int i,
                  int j)

Returns the value in this matrix at the specified position.

Specified by:

get in interface Matrix

Parameters:

i - The row number.

j - The column number.

Returns:

The value in this matrix at the specified position.

put

public void put(int i,
                int j,
                double d)

Stores the specified value in this matrix at the specified position.

Specified by:

put in interface Matrix

Parameters:

i - The row number.

j - The column number.

datum - The value to be stored.

transpose

public Matrix transpose()

Returns the transpose of this matrix.

Specified by:

transpose in interface Matrix

Returns:

The transpose of this matrix.

times

public Matrix times(Matrix mat)

Returns the product of this matrix and the specified matrix.

Specified by:

times in interface Matrix

Parameters:

The - specified matrix.

Returns:

The product of this matrix and the specified matrix

Throws:

java.lang.IllegalArgumentException - If the matrices are incompatible.

plus

public Matrix plus(Matrix mat)

Returns the sum of this matrix and the specified matrix.

Specified by:

plus in interface Matrix

Parameters:

The - specified matrix.

Returns:

The sum of this matrix and the specified matrix

Throws:

java.lang.IllegalArgumentException - If the matrices are incompatible.