de.gsi.math.matrix

Class MatrixFactory

java.lang.Object

de.gsi.math.matrix.MatrixFactory

public class MatrixFactory
extends Object

Constructor Summary

Constructors

Constructor and Description
MatrixFactory()

Method Summary

Modifier and Type	Method and Description
static MatrixD	constructWithCopy(double[][] A) Construct a matrix from a copy of a 2-D array.
static MatrixD	identity(int m, int n) Generate identity matrix
static MatrixD	random(int m, int n) Generate matrix with random elements

Methods inherited from class java.lang.Object

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

Constructor Detail

MatrixFactory

public MatrixFactory()

Method Detail

constructWithCopy

public static MatrixD constructWithCopy(double[][] A)

Construct a matrix from a copy of a 2-D array.

Parameters:

A - Two-dimensional array of doubles.

Returns:

deep copy

Throws:

IllegalArgumentException - All rows must have the same length

identity

public static MatrixD identity(int m,
                               int n)

Generate identity matrix

Parameters:

m - Number of rows.

n - Number of colums.

Returns:

An m-by-n matrix with ones on the diagonal and zeros elsewhere.

random

public static MatrixD random(int m,
                             int n)

Generate matrix with random elements

Parameters:

m - Number of rows.

n - Number of colums.

Returns:

An m-by-n matrix with uniformly distributed random elements.