[SciPy-user] Why are there two FFTs?

[Travis Oliphant]

Gary wrote:

>scipy.fftpack.*   and numpy.dft.*
>
>are they different under the hood
>
Yes.  scipy.fftpack can link to fftw and/or djbfft for example which can 
be faster (but also have more install difficulties...).  Also the 
extension module is f2py generated.

numpy.dft always uses an f2c'd version of fftpack and a hand-written 
extension module.

-teo