[OT] Fourier analysis question using Gnumeric
William Park
opengeometry-FFYn/CNdgSA at public.gmane.org
Wed Sep 26 05:46:19 UTC 2012
On Wed, Sep 26, 2012 at 01:20:16AM -0400, William Park wrote:
> On Wed, Sep 26, 2012 at 01:10:44AM -0400, Walter Dnes wrote:
> > This is a personal project, not a homework assignment<G>. I have a
> > rather noisy series of approximately 24,000 data points. Gnumeric's FFT
> > analysis insists on a whole-number power of 2, so I'll use the last
> > 16,384 data points. I highlighted the data, and in the menu selected...
> >
> > ==> Statistics ==> Dependant observations ==> Fourier analysis
> >
> > The final output was 2 columns ("Real" and "Imaginary") of 16,384
> > rows of numbers. Now what? How do I interpret the output? Anybody
> > here with some stats knowledge?
>
> What you do want at the end? Real signal is time-based, so frequency
^^^^^^\__ do you
Beer and Email don't mix!
> spectrum is just the mean, not the end.
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