how to use fourier transform to analyze time series data?

I have an time series signal.I want to calculate first,second,third harmonic curves according to the following research paper, using fourier transform.how to do it?please help me.thanks!

Réponses (1)

Henric Rydén
Henric Rydén le 19 Mai 2014
Modifié(e) : Henric Rydén le 21 Mai 2014
Hi,
your question is not very clear but look up the fft command

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