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
2013-12-30
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
2013-12-30
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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