[Kst] [Bug 126641] Should be able to calculate white noise limit

[Duncan Hanson]

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------- Additional Comments From duncan.hanson gmail com  2006-05-26 20:55 -------
The LFI team would also like to calculate the knee frequency of a power spectrum.

I would like to implement this as a fitting plugin. The plugin will operate on a power spectrum, fitting for the 1/(f^a) noise and the white noise limit at high frequencies. The options will be something like..

- # of points to fit 1/f noise (or a maximum 1/f noise frequency).
- # of points to fit white noise (or a minimum white noise frequency).

It will produce scalars for the knee frequency, the white noise limit, and the fit parameter a.

It will produce a plot with the original power spectrum, a fit curve which shows the intersection of the white noise limit with the 1/f noise, and labels containing the values of the calculated scalars.

Does this sound good?