Package org.hortonmachine.gears.utils.math.matrixes

Class SquareMatrix

java.lang.Object

org.hortonmachine.gears.utils.math.matrixes.Matrix

org.hortonmachine.gears.utils.math.matrixes.SquareMatrix

Direct Known Subclasses:

IdentityMatrix, LinearSystem

public class SquareMatrix
extends Matrix

From: Java Number Cruncher The Java Programmer's Guide to Numerical Computation by Ronald Mak A square matrix.

Field Summary

Fields inherited from class org.hortonmachine.gears.utils.math.matrixes.Matrix

nCols, nRows, values

Constructor Summary

Constructors

Constructor	Description
SquareMatrix(double[][] values)	Constructor.
SquareMatrix(int n)	Constructor.

Method Summary

Modifier and Type	Method	Description
SquareMatrix	add(SquareMatrix sm)	Add another square matrix to this matrix.
SquareMatrix	multiply(SquareMatrix sm)	Multiply this square matrix by another square matrix.
protected void	set(double[][] values)	Set this square matrix from a 2-d array of values.
SquareMatrix	subtract(SquareMatrix sm)	Subtract another square matrix from this matrix.

Methods inherited from class org.hortonmachine.gears.utils.math.matrixes.Matrix

add, at, columnCount, copyValues2D, getColumn, getRow, multiply, multiply, multiply, multiply, rowCount, set, setColumn, setRow, subtract, transpose, values

Methods inherited from class java.lang.Object

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

Constructor Detail

SquareMatrix

public SquareMatrix(int n)

Constructor.

Parameters:

n - the number of rows == the number of columns

SquareMatrix

public SquareMatrix(double[][] values)

Constructor.

Parameters:

values - the array of values

Method Detail

set

protected void set(double[][] values)

Set this square matrix from a 2-d array of values. If the values are not square, only the upper left square is used.

Overrides:

set in class Matrix

Parameters:

values - the 2-d array of values

add

public SquareMatrix add(SquareMatrix sm)
                 throws MatrixException

Add another square matrix to this matrix.

Parameters:

sm - the square matrix addend

Returns:

the sum matrix

Throws:

numbercruncher.MatrixException - for invalid size

MatrixException

subtract

public SquareMatrix subtract(SquareMatrix sm)
                      throws MatrixException

Subtract another square matrix from this matrix.

Parameters:

sm - the square matrix subrrahend

Returns:

the difference matrix

Throws:

numbercruncher.MatrixException - for invalid size

MatrixException

multiply

public SquareMatrix multiply(SquareMatrix sm)
                      throws MatrixException

Multiply this square matrix by another square matrix.

Parameters:

sm - the square matrix multiplier

Returns:

the product matrix

Throws:

numbercruncher.MatrixException - for invalid size

MatrixException