title: Is there a way to apply FFT to an unevenly spaced time series?
body: <p>i have two series X and Y. X contains time values and Y contains a real function values for those times. I wish to perform FFT of the Y signal in python. The problem is that X is unevenly spaced: X(n+1)-X(n) /= constant. Is there a known way to apply FFT to such data ?</p>