[SciPy-user] in-place data permutation
Travis Oliphant
oliphant at ee.byu.edu
Fri Feb 24 19:18:17 EST 2006
Brian Hawthorne wrote:
> Hello,
> I'm looking for an efficient implementation of permuting the positions
> of data in
> an array which doesn't require copying the array. Specifically, I am
> shifting an
> array by half its length along the 0th dimension, in order to put
> "textbook" ordered
> frequency data into the packed format expected by inverse_fft. I'm
> surprised
> this is not already implemented in numpy... seems like it would be a
> common
> need. Am I missing something obvious?
dft.fftfreq
dft.fftshift
dft.ifftshift
-Travis
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