Package de.gsi.math.spectra.dst
Class DoubleDST_1D
- java.lang.Object
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- de.gsi.math.spectra.dst.DoubleDST_1D
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public class DoubleDST_1D extends java.lang.ObjectComputes 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)
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Constructor Summary
Constructors Constructor Description DoubleDST_1D(int n)Creates new instance of DoubleDST_1D.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidforward(double[] a, boolean scale)Computes 1D forward DST (DST-II) leaving the result ina.voidforward(double[] a, int offa, boolean scale)Computes 1D forward DST (DST-II) leaving the result ina.voidinverse(double[] a, boolean scale)Computes 1D inverse DST (DST-III) leaving the result ina.voidinverse(double[] a, int offa, boolean scale)Computes 1D inverse DST (DST-III) leaving the result ina.
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Method Detail
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forward
public void forward(double[] a, boolean scale)Computes 1D forward DST (DST-II) leaving the result ina.- Parameters:
a- data to transformscale- if true then scaling is performed
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forward
public void forward(double[] a, int offa, boolean scale)Computes 1D forward DST (DST-II) leaving the result ina.- Parameters:
a- data to transformoffa- index of the first element in arrayascale- if true then scaling is performed
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inverse
public void inverse(double[] a, boolean scale)Computes 1D inverse DST (DST-III) leaving the result ina.- Parameters:
a- data to transformscale- if true then scaling is performed
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inverse
public void inverse(double[] a, int offa, boolean scale)Computes 1D inverse DST (DST-III) leaving the result ina.- Parameters:
a- data to transformoffa- index of the first element in arrayascale- if true then scaling is performed
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