edu.buffalo.fs7.mathlib
Class Matrix

java.lang.Object
  |
  +--edu.buffalo.fs7.mathlib.MathObject
        |
        +--edu.buffalo.fs7.mathlib.Argument
              |
              +--edu.buffalo.fs7.mathlib.Matrix

All Implemented Interfaces:

java.lang.Cloneable

public class Matrix

extends Argument

Class representing a mathematical matrix object.

See Also:

BinaryOp

Field Summary

protected boolean	conjugate holds conjugate information
protected Complex[][]	data holds the complex components
protected int	m holds dimension information
protected int	n holds dimension information
protected boolean	transpose holds transpose information

Fields inherited from class edu.buffalo.fs7.mathlib.MathObject

mathlib

Constructor Summary

Matrix(int n)
constructs a zero (n x n) matrix

Matrix(int n, int m)
constructs a zero (n x m) matrix (n rows, m columns)

Matrix(MathObject o)
clone constructor

Method Summary

java.lang.Object	clone() clone method
void	conjugate() complex conjugates the matrix
boolean	equals(MathObject m1) equality predicate
Complex	getElement(int n, int m) returns the element in row n, col m.
int	m() returns the number of columns
int	n() returns the number of rows.
void	negative() negates the matrix
static Matrix	parseMatrix(java.lang.String str) parses a matrix from a string.
void	setElement(int n, int m, Complex value) sets the element in row n, col m to a certain value.
java.lang.String	toParseableString() returns a parsable string representation of the matrix (complex numbers in machine precision).
java.lang.String	toString() returns a string representation of the object
void	transpose() transposes the matrix

Methods inherited from class java.lang.Object

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

Field Detail

data

protected Complex[][] data

holds the complex components

n

protected int n

holds dimension information

m

protected int m

holds dimension information

transpose

protected boolean transpose

holds transpose information

conjugate

protected boolean conjugate

holds conjugate information

Constructor Detail

Matrix

public Matrix(int n,
              int m)

constructs a zero (n x m) matrix (n rows, m columns)

Matrix

public Matrix(int n)

constructs a zero (n x n) matrix

Matrix

public Matrix(MathObject o)

clone constructor

Method Detail

clone

public java.lang.Object clone()

clone method

Overrides:

clone in class MathObject

parseMatrix

public static Matrix parseMatrix(java.lang.String str)
                          throws java.lang.IllegalArgumentException,
                                 java.lang.NumberFormatException

parses a matrix from a string. The matrix given by [a b c, d e f, g h i] is parsed into

a b c

d e f

g h i

The method throws an IllegalArgumentException of a NumberFormatException if the parse process fails.

Returns:

matrix

transpose

public void transpose()

transposes the matrix

conjugate

public void conjugate()

complex conjugates the matrix

negative

public void negative()

negates the matrix

equals

public boolean equals(MathObject m1)

equality predicate

Overrides:

equals in class Argument

getElement

public Complex getElement(int n,
                          int m)

returns the element in row n, col m. This method should always be used to access components, since for example the transpose method not really transposes the matrix, but rater sets a flag.

Parameters:

n - row

m - col

Returns:

component

setElement

public void setElement(int n,
                       int m,
                       Complex value)

sets the element in row n, col m to a certain value. This method should always be used to access components, since for example the transpose method not really transposes the matrix, but rater sets a flag.

Parameters:

n - row

m - col

value - new component value

n

public int n()

returns the number of rows.

m

public int m()

returns the number of columns

toString

public java.lang.String toString()

returns a string representation of the object

Overrides:

toString in class MathObject

Following copied from class: edu.buffalo.fs7.mathlib.MathObject

See Also:

MathObject.toParseableString()

toParseableString

public java.lang.String toParseableString()

returns a parsable string representation of the matrix (complex numbers in machine precision).

Overrides:

toParseableString in class MathObject

Following copied from class: edu.buffalo.fs7.mathlib.MathObject

See Also:

MathObject.toString()