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Help with spectral analysis of a time series

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Joseph Strong
Joseph Strong on 13 Jan 2021
Answered: Pratyush Roy on 1 Feb 2021
I have a data set that contains surface elevation in meters and time in seconds.
I need to convert this data into an energy spectrum with Frequency on the X axis and Spectral Density (Amplitude Squared/Frequency) on the Y axis.
I believe I need to use Fourier Transform to achieve this but am currently unsure how to do this, any help would be greatly appreciated.

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