how to use fourier transform to analyze time series data?

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mahesh chathuranga
mahesh chathuranga il 19 Mag 2014
Modificato: Henric Rydén il 21 Mag 2014
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!

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Henric Rydén
Henric Rydén il 19 Mag 2014
Modificato: Henric Rydén il 21 Mag 2014
Hi,
your question is not very clear but look up the fft command

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