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Re: [Help-gsl] Requesting feedback on the FFT interface

From: Brian Gough
Subject: Re: [Help-gsl] Requesting feedback on the FFT interface
Date: Mon, 15 May 2006 21:01:31 +0100

Dimitris Papavasiliou writes:
 > 3) Well I suppose there's a good reason for this but the halfcomplex 
 > arrays produced by radix2 and mixed-radix routines are different. 

The Radix-2 ffts are designed to operate inplace without using any
extra memory, so the layout is a consequence of that constraint and
the algorithm.  

If memory is not an issue it is fine to use the Mixed Radix routines
for size N=2^k to get the same layout.  There is no requirement to use
radix 2 routines in that case.

Brian Gough

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