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From: Greg Heath <heath@alumni.brown.edu>
Newsgroups: comp.soft-sys.matlab
Subject: Re: integrating with FFT
Date: Wed, 26 Dec 2007 20:09:26 -0800 (PST)
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On Dec 26, 8:56=A0pm, "Paul " <p...@ceri.memphis.edu> wrote:
> You can integrate in the frequency domain by dividing the
> complex FFT by iw. =A0I've been trying this but to no avail
> since I seem to be getting hung up on the symmetry of the
> FFT around the nyquist.
>
> For example:
>
> x =3D 1:10;
>
> and the integral of x is trivial.
>
> But I try to do this via fft, division by iw and then
> inverse fft and end up with junk. =A0 I recall seeing this
> done someplace before but I checked the archives and found
> nothing.
>
> Can anybody show how this is done!

The answer is probably in the details of your code. Post it
and useful advice will probably follow.

Hope this helps.

Greg