[SciPy-user] Why are there two FFTs?
oliphant.travis at ieee.org
Fri Jan 6 15:11:38 CST 2006
Sebastian Haase wrote:
>On Friday 06 January 2006 11:09, Travis Oliphant 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
>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 ...
No, I don't think this is supported yet. But, it could be added for
scipy.fftpack. I don't think we will add it to numpy.
Otherwise, you will need to call out to the library yourself (use
numpy.f2py to help...)
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