Time Series Forecasting, Fourier, Ensemble Method, Data Science, Signal Processing.
label='envelope regression: past') spec4_regress.loc[index_test].plot(ax=ax, color='C3', label='envelope regression: future') _ = ax.legend() envelope fit The gray line is the envelope itself — it’s very noisy. The blue line is the envelope, the strength of the variation of the 4-quarter seasonal