Fourier Transform, Fft, Fast Fourier Transform, Algorithms, Mathematics.
discrete points. For e.g. in time series, x is time and f(t) could be the average CPU usage for every t=5 minutes. Thus for 24 hours (or 1440 minutes), we will obtain 288 values of f(t) evaluated at t=0, 5, 10,…. minutes. In such cases, we cannot use integration but instead use summation. When we