com.numericalmethod.suanshu.matrix.doubles.matrixtype.mathoperation
Class SimpleMatrixMathOperation

java.lang.Object
  com.numericalmethod.suanshu.matrix.doubles.matrixtype.mathoperation.SimpleMatrixMathOperation

All Implemented Interfaces:

MatrixMathOperation

public class SimpleMatrixMathOperation
extends java.lang.Object
implements MatrixMathOperation

This class is one implementation of MatrixMathOperation.

It exists only for the purpose of code reuse by subclasses.

Since these functions work with all Matrix implementations, they are bound to have suboptimal performance. Subclasses can override them by taking advantage of having access to the internal members to increase performance.

Constructor Summary

SimpleMatrixMathOperation()

Method Summary

Matrix	add(Matrix A1, Matrix A2) A1 + A2.
Matrix	minus(Matrix A1, Matrix A2) A1 - A2.
Matrix	multiply(Matrix A1, Matrix A2) A1 %*% A2.
Vector	multiply(Matrix A, Vector v) A %*% v
Matrix	scaled(Matrix A, double scalar) s * A
Matrix	transpose(Matrix A) t(A)

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleMatrixMathOperation

public SimpleMatrixMathOperation()

Method Detail

add

public Matrix add(Matrix A1,
                  Matrix A2)

A1 + A2.

Specified by:

add in interface MatrixMathOperation

Parameters:

A1 - the first matrix

A2 - the second matrix

Returns:

a matrix which is the sum of A1 and A2

minus

public Matrix minus(Matrix A1,
                    Matrix A2)

A1 - A2.

Specified by:

minus in interface MatrixMathOperation

Parameters:

A1 - the first matrix

A2 - the second matrix

Returns:

a matrix which is the difference between A1 and A2

multiply

public Matrix multiply(Matrix A1,
                       Matrix A2)

A1 %*% A2.

Specified by:

multiply in interface MatrixMathOperation

Parameters:

A1 - the first matrix

A2 - the second matrix

Returns:

a matrix which is the product of A1 and A2

multiply

public Vector multiply(Matrix A,
                       Vector v)

Description copied from interface: MatrixMathOperation

A %*% v

Specified by:

multiply in interface MatrixMathOperation

Parameters:

A - a matrix

v - a vector

Returns:

the product of A and v

scaled

public Matrix scaled(Matrix A,
                     double scalar)

Description copied from interface: MatrixMathOperation

s * A

Specified by:

scaled in interface MatrixMathOperation

Parameters:

A - a matrix

scalar - a scalar

Returns:

A scaled by s

transpose

public Matrix transpose(Matrix A)

Description copied from interface: MatrixMathOperation

t(A)

Specified by:

transpose in interface MatrixMathOperation

Parameters:

A - a matrix

Returns:

the transpose of A