[OT] Fourier analysis question using Gnumeric

[William Park]

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
spectrum is just the mean, not the end.  
-- 
William
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