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How I can smooth my fourier amplitude spectra

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Khalid Mahmood
Khalid Mahmood il 30 Dic 2013
Commentato: Khalid Mahmood il 3 Gen 2014
How to smooth an earthquake fourier amplitude spectra for better interpretation.

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Wayne King
Wayne King il 30 Dic 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
Wayne King il 30 Dic 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.
Khalid Mahmood
Khalid Mahmood il 3 Gen 2014
Dear King this is fourier amplitude spectrum. I am interested to get a smooth line on this for better interpretation. Thanks\

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