Time Series Forecasting, Fourier, Ensemble Method, Data Science, Signal Processing.
parameters are the weights applied to each column — their relative values literally model the shape of the wave In Pandas form, here is a seasonal feature one-hot encoded with a period of 4 observations: s(1,4) s(2,4) s(3,4) s(4,4) time 1956Q1 1.0 0.0 0.0 0.0 1956Q2 0.0 1.0 0.0 0.0 1956Q3 0.0 0.0