DoubleDHT_1D (math 11.1.0 API)

java.lang.Object
- de.gsi.math.spectra.dht.DoubleDHT_1D

```
public class DoubleDHT_1D
extends java.lang.Object
```
Computes 1D Discrete Hartley Transform (DHT) of real, double precision data. The size of the data can be an arbitrary number. It uses FFT algorithm. This is a parallel implementation optimized for SMP systems.

Author:

Piotr Wendykier (piotr.wendykier@gmail.com)

Constructor Summary

Constructors
Constructor Description

DoubleDHT_1D(int n)
Creates new instance of DoubleDHT_1D.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`forward(double[] a)`	Computes 1D real, forward DHT leaving the result in `a`.
`void`	`forward(double[] a, int offa)`	Computes 1D real, forward DHT leaving the result in `a`.
`void`	`inverse(double[] a, boolean scale)`	Computes 1D real, inverse DHT leaving the result in `a`.
`void`	`inverse(double[] a, int offa, boolean scale)`	Computes 1D real, inverse DHT 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
  - DoubleDHT_1D
```
public DoubleDHT_1D(int n)
```
    Creates new instance of DoubleDHT_1D.
    
    Parameters:
    
    n - size of data
- Method Detail
  - forward
```
public void forward(double[] a)
```
    Computes 1D real, forward DHT leaving the result in a.
    
    Parameters:
    
    a - data to transform
  - forward
```
public void forward(double[] a,
                    int offa)
```
    Computes 1D real, forward DHT leaving the result in a.
    
    Parameters:
    
    a - data to transform
    
    offa - index of the first element in array a
  - inverse
```
public void inverse(double[] a,
                    boolean scale)
```
    Computes 1D real, inverse DHT 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 real, inverse DHT 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