Hi Guys,

I had a monthly time series's data of land temperature from 1980 to 2008.
After plotting a scatter diagram, it seems that annually, there is a semi
sinusoidal cycle. How do I run Fourier's series to the data so that I can
fit model on it?

I am really sorry for my question sound stupid, but I just don't know where
to start.

I am desperately looking for help from you guys.

Thanks in advance.

Eddie

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