fft of set of data points in csv file

I want to find the frequency components of a set of data points in a .csv file. There are 50k points sampled at 2e-5 interval.

I especially want to see subharmonic oscillations (fundamental is 50Hz)

Thanks in advance

Answer 1

[Geoff Hayes]

Shyam - use cvsread to read this one second's worth of data from the file and to store it in an array. Then compute the FFT using fft on that data.

[Shyam]

I did the same, but i am not able to see the frequency spectrum. Especially, i am interested in subharmonic components

[Geoff Hayes]

Please show us what code you have written to do this, and perhaps include the data so that we can try it out too.