[SciPy-user] Why are there two FFTs?

Sebastian Haase haase at msg.ucsf.edu
Fri Jan 6 14:14:09 CST 2006


On Friday 06 January 2006 11:09, Travis Oliphant wrote:
> 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

Is there any support for "single precision" (float32,complex32) fft ?
We consider this quite important since our 3D image can already be on the 
order of 500MB ...

- Sebastian



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