a modest contribution (FFTW nlffi code)

Hi All,

I have created a small framework to interface with the FFTW library.   
If you don't know what FFTW is, then you probably don't need it.

Please find the code at

http://www.aracnet.com/~briand/mlcode/

Let me know if you have any questions.  Even if you don't need an  
FFTW link, I think this is a really good example of non-trivial NLFFI  
use.

It also includes a structure for some very helpful math-related  
functions, and support for complex numbers (awfully useful when doing  
work with FFT's).

I'm using it, so I know it will work :-)  Probably you will have to  
tweak the code so it can find libfftw3.so


Enjoy.

Brian


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