apply_stationarity      Apply Stationarity Transformation to a
                        Train/Test Split
btwar_fit               Fit a Butterworth-Induced Autoregressive Model
coef.btwar              Extract AR Coefficients from a BTWAR Model
compute_spectrum        Compute the One-Sided Power Spectrum
fitted.btwar            Fitted Values from a BTWAR Model
mse                     Mean Squared Error
plot.btwar              Plot Predictions from a BTWAR Model
plot_bode               Plot the Bode Magnitude Diagram of a BTWAR
                        Model
plot_freq_amplitude     Plot the Frequency Amplitude Spectrum of a Time
                        Series
plot_zpoles             Plot Z-Plane Poles from a BTWAR Model
poles_AR                Compute Z-Plane Poles of an AR Model
predict.btwar           Predict from a BTWAR Model
print.btwar             Print a BTWAR Model
print.summary.btwar     Print a BTWAR Model Summary
residuals.btwar         Residuals from a BTWAR Model
rmse                    Root Mean Squared Error
simulate_ar_split       Simulate an AR(p) Series and Split into
                        Train/Test Sets
summary.btwar           Summarise a BTWAR Model
yhat_ar                 One-Step-Ahead AR Predictions
yhat_arma               One-Step-Ahead ARMA Predictions
