[OT] Fourier analysis question using Gnumeric

[Walter Dnes]

On Wed, Sep 26, 2012 at 08:26:30AM -0400, Mike wrote

> Second, you can obtain amplitude and phase from your re,im complex output:
>   amplitude = sqrt (re^2 + im*2)
>   phase = arctan (im / re)
> which tends to be a bit more physically meaningful than the complex data.

  as I mentioned in my reply to William, I'm looking for periodicities
or cycles in the data.

-- 
Walter Dnes <waltdnes-SLHPyeZ9y/tg9hUCZPvPmw at public.gmane.org>
I don't run "desktop environments"; I run useful applications
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