Time Series Forecasting, Fourier, Ensemble Method, Data Science, Signal Processing.
2014Q1 0.000000 1.000000 0.000000 1.000000 [233 rows x 4 columns] The Fourier theorem states that (loosely speaking) when representing a well-behaved periodic function this way, by adjusting the weights a(n) and b(n), the series can be made to converge to the function. So a finite Fourier sum might