Hi all.

PDL::FFTW3 is now on CPAN:

https://metacpan.org/pod/release/DKOGAN/PDL-FFTW3-0.02.1/README.pod

This module is intended to be a replacement for PDL::FFT and PDL::FFTW.
It is fast, has simple interfaces, and follows "normal" FFT conventions.
These are similar to other numerical tools, like numpy. Specifically:

- The DC component is the first entry in the transformed array
- fft is unnormalized, ifft is normalized, so ifft(fft(x)) == x

When using complex numbers this module expects a (real,imag) tuple in
the first piddle dimension. PDL has some complex-number support in
PDL::Complex, but PDL::FFTW3 does not use it, and I would strongly
recommend against it.

Thanks to Craig DeForest this module now has support for Alien::FFTW3,
which makes installation easier on some operating systems.

Let me know if any issues come up.

Dima

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