Convolution (OpenTrafficSim core classes 1.6.0 API)

java.lang.Object
- org.opentrafficsim.core.egtf.Convolution

```
public final class Convolution
extends Object
```
Utility class for convolution using fast fourier transformation. This utility is specifically tailored to EGTF and not for general fast fourier purposes.
Copyright (c) 2013-2022 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.

Version:

$Revision$, $LastChangedDate$, by $Author$, initial version 31 okt. 2018

Author:

Alexander Verbraeck, Peter Knoppers, Wouter Schakel

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static double[][]`	`convolution(double[][] a, double[][] b)`	Convolution of two matrices using fast fourier transform.
`static void`	`main(String... args)`	Program entry point.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - main
```
public static void main(String... args)
```
    Program entry point.
    
    Parameters:
    
    args - String...; the command line arguments (not used)
  - convolution
```
public static double[][] convolution(double[][] a,
                                     double[][] b)
```
    Convolution of two matrices using fast fourier transform.
    
    Parameters:
    
    a - double[][]; the kernel matrix
    
    b - double[][]; the data matrix
    
    Returns:
    
    double[][]; convolution of a over b, same size as b