edu.emory.mathcs.jtransforms.dst

Class DoubleDST_1D

java.lang.Object

edu.emory.mathcs.jtransforms.dst.DoubleDST_1D

public class DoubleDST_1D
extends Object

Computes 1D Discrete Sine Transform (DST) of double precision data. The size of data can be an arbitrary number. It uses DCT algorithm. This is a parallel implementation optimized for SMP systems.

Author:

Piotr Wendykier (piotr.wendykier@gmail.com)

Constructor Summary

Constructors

Constructor and Description
DoubleDST_1D(int n) Creates new instance of DoubleDST_1D.

Method Summary

Modifier and Type	Method and Description
void	forward(double[] a, boolean scale) Computes 1D forward DST (DST-II) leaving the result in a.
void	forward(double[] a, int offa, boolean scale) Computes 1D forward DST (DST-II) leaving the result in a.
void	inverse(double[] a, boolean scale) Computes 1D inverse DST (DST-III) leaving the result in a.
void	inverse(double[] a, int offa, boolean scale) Computes 1D inverse DST (DST-III) leaving the result in a.

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleDST_1D

public DoubleDST_1D(int n)

Creates new instance of DoubleDST_1D.

Parameters:

n - size of data

Method Detail

forward

public void forward(double[] a,
                    boolean scale)

Computes 1D forward DST (DST-II) leaving the result in a.

Parameters:

a - data to transform

scale - if true then scaling is performed

forward

public void forward(double[] a,
                    int offa,
                    boolean scale)

Computes 1D forward DST (DST-II) leaving the result in a.

Parameters:

a - data to transform

offa - index of the first element in array a

scale - if true then scaling is performed

inverse

public void inverse(double[] a,
                    boolean scale)

Computes 1D inverse DST (DST-III) leaving the result in a.

Parameters:

a - data to transform

scale - if true then scaling is performed

inverse

public void inverse(double[] a,
                    int offa,
                    boolean scale)

Computes 1D inverse DST (DST-III) leaving the result in a.

Parameters:

a - data to transform

offa - index of the first element in array a

scale - if true then scaling is performed