How I can smooth my fourier amplitude spectra
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How to smooth an earthquake fourier amplitude spectra for better interpretation.
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Wayne King
on 30 Dec 2013
You can use pwelch() or pmtm() to obtain a smoothed nonparametric estimate. This is recommended, alternatively you can use a parametric method to get a really smooth spectrum, but very sensitive to model misspecification.
Please attach data and the sampling rate and I can show you how to use pwelch() and pmtm().
Both require the Signal Processing Toolbox.
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Wayne King
on 30 Dec 2013
Is this the time data or the Fourier amplitude spectrum? It looks like it is the Fourier magnitudes in which case that is very smooth already.
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