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fft on simple plot

hi there,

I'm new here so forgive my ignorance.

I have a very simple line plot code

plot([dates in years],[rainfall in mm])

I want to run a fft of the data.

How can i code this?!

Cheers, Will

Scilab

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Please explore the "fft" command in Scilab. Since your data will most likely be aperiodic, see a similar discussion here.

Also, Octave has a "signal" package that facilitates many signal processing functions that could come handy to you. As a matter of fact, we also have a scilab-octave toolbox which can be downloaded from here. Using this toolbox, all of the "signal" package functions can be easily called from scilab.

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