Jampack

Class Zdiagmat

java.lang.Object

Jampack.Zdiagmat

public class Zdiagmat
extends Object

Zdiagmat is a storage efficient representation of a complex diagonal matrix.

Version:

Pre-alpha

Author:

G. W. Stewart

Field Summary

Fields

Modifier and Type	Field and Description
protected int	basex The base index
int	bx The base index (public)
int	dx The index of the last diagonal (public)
protected double[]	im The imaginary part of the diagonal
int	n The order of the matrix (public)
protected int	order The order of the matrix
protected double[]	re The real part of the diagonal

Constructor Summary

Constructors

Constructor and Description
Zdiagmat(int order) Constructs a Zdiagmat and initializes it to zero.
Zdiagmat(int order, Z val) Constructs a Zdiagmat and initializes it to a constant.
Zdiagmat(Z1 val) Constructs a Zdiagmat and initializes it to a Z1.
Zdiagmat(Zdiagmat D) Constructs a Zdiagmat and initializes it to another Zdiagmat.
Zdiagmat(Zmat A) Constructs a Zdiagmat and initializes it to the principal diagonal of a Zmat.
Zdiagmat(Zmat A, int k) Constructs a Zdiagmat and initializes it to the diagonal of a Zmat.

Method Summary

Methods

Modifier and Type	Method and Description
Z	get(int ii) Gets the ii-th diagonal element of a Zdiagmat.
Z	get0(int i) Gets the ith diagonal of a of a Zdiagmat (0-based).
void	getProperties() Sets the public parameters.
void	put(int ii, Z val) Writes the ii-th diagonal element of a Zdiagmat.
void	put0(int i, Z val) Writes the ith diagonal element of a Zdiagmat (0-based).

Methods inherited from class java.lang.Object

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

Field Detail

order

protected int order

The order of the matrix

basex

protected int basex

The base index

re

protected double[] re

The real part of the diagonal

im

protected double[] im

The imaginary part of the diagonal

n

public int n

The order of the matrix (public)

bx

public int bx

The base index (public)

dx

public int dx

The index of the last diagonal (public)

Constructor Detail

Zdiagmat

public Zdiagmat(int order)

Constructs a Zdiagmat and initializes it to zero.

Parameters:

order - The order of the new Zdiagmat

Zdiagmat

public Zdiagmat(int order,
        Z val)

Constructs a Zdiagmat and initializes it to a constant.

Parameters:

order - The order of the new Zdiagmat

val - The value to which the diagonal is to be initialized

Zdiagmat

public Zdiagmat(Z1 val)

Constructs a Zdiagmat and initializes it to a Z1.

Parameters:

val - A Z1

Zdiagmat

public Zdiagmat(Zmat A,
        int k)
         throws JampackException

Constructs a Zdiagmat and initializes it to the diagonal of a Zmat.

Parameters:

A - The Zmat

k - The diagonal. For k=0 gives the princpal diagonal; k>0, the kth superdiagonal; k<0, the kth subdiagonal.

Throws:

JampackException - Thrown for k to large or small.

Zdiagmat

public Zdiagmat(Zmat A)
         throws JampackException

Constructs a Zdiagmat and initializes it to the principal diagonal of a Zmat.

Parameters:

A - A Zmat

Throws:

JampackException - Passed from below.

Zdiagmat

public Zdiagmat(Zdiagmat D)

Constructs a Zdiagmat and initializes it to another Zdiagmat.

Parameters:

D - A Zdiagmat

Method Detail

getProperties

public void getProperties()

Sets the public parameters.

get

public Z get(int ii)

Gets the ii-th diagonal element of a Zdiagmat.

Parameters:

ii - An integer

Returns:

The ii-th element of this Zdiagmat

get0

public Z get0(int i)

Gets the ith diagonal of a of a Zdiagmat (0-based).

put

public void put(int ii,
       Z val)

Writes the ii-th diagonal element of a Zdiagmat.

Parameters:

ii - An integer

val - A Z

put0

public void put0(int i,
        Z val)

Writes the ith diagonal element of a Zdiagmat (0-based).