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Re: [Bug-gsl] A little documentation mistake

From: Brian Gough
Subject: Re: [Bug-gsl] A little documentation mistake
Date: Thu, 04 Jan 2007 05:27:15 +0000
User-agent: Wanderlust/2.14.0 (Africa) Emacs/21.3 Mule/5.0 (SAKAKI)

At Wed, 20 Dec 2006 15:49:57 -0200,
Alexandre Zabot wrote:
> I found a little mistake in the section
> "15.6 Radix-2 FFT routines for real data"
> of the GSL documentation:
> In the table showing the arrangement of the output data is written
> complex[k'].imag   =   -data[N-k]
> but the right is
> complex[k'].imag   =   -data[k']
> isn't it?

Thanks for your email,  

I don't think it's a bug -- in the example k'=N-k (shown on the
previous line) so the result is the same. 

> I'd like to give you a suggestion, too: why don't you write a simple
> c-example,

I've added a note that the function gsl_fft_halfcomplex_unpack
works for this, it has some example c-code.

best regards,

Brian Gough
(GSL Maintainer)

Network Theory Ltd,
Publishing the GSL Manual - http://www.network-theory.co.uk/gsl/manual/

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