[Numpy-discussion] numarray: 3D Fourier transforms

Christian Meesters cmeesters at ucdavis.edu
Tue Nov 23 12:29:11 CST 2004


Hi Peter,

Well, seems like I just overlooked that feature. I didn't check your 
'claims' yet, but it sounds like my problem is solved.

Thanks a lot.
Cheers,
Christian

On Nov 23, 2004, at 12:16 PM, Peter Verveer wrote:

> Numarray has N-dimensional fft's, they are just not documented in the 
> manual (this should be fixed, will do that as soon as find the time). 
> There are the following functions in numarray.fft:
>
> fftnd()
> inverse_fftnd()
> real_fftnd()
> inverse_real_fftnd()
>
> They are documented in the source code, try the following:
>
> >>> from numarray import fft
> >>> help(fft.fftnd)
>
> Or alternatively, implement your 3D fft as a sequence of three 1D 
> fft's.
>
> Cheers, Peter
>
> On Nov 23, 2004, at 8:59 PM, Christian Meesters wrote:
>
>> Hi
>>
>> I only hope that you guys on this list can help me, for I didn't find 
>> a list specified on numarray.
>>
>> Well, may problem is that I want to write an algorithm where I 
>> combine amplitude data from one 3D-image volume with phase data from 
>> another. (Actually they are identical except for one small 
>> correction, that's why this should be legal.) Numarray only offers 1D 
>> and 2D FFTs. I could possibly implement a 3D transform, but if 
>> somebody already has written something like this, it would be very 
>> nice if one could point me on an URL for this.
>>
>> Thanks a lot in advance.
>>
>> Cheers
>> Christian Meesters
>>
>>
>>
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