How to do fft of a csv file to plot amplitude spectrum

I have a csv files with 2 columns. 1st column has time and second column has the value (These are the outut values of a VCO that is not constant) . Around 2006 rows are there in total. I want to plot the amplitude spectrum of these values. For that I have to do the FFT of these values. What is the code for doing this?

Answer 1

[Star Strider]

See the documentation for both fft and nufft. One of those should apply to your problem.

Another optioon is the pspectrum function.