Represents Feed-forward single-hidden-layer neural network autoregression models.
buildModel(...) passes on parameter PI
and fitting and forecasting functions to FitModel's method setFittedFcasted
; applies Box-Cox transformation without bias-adjustment; ignores passing function which checks whether residuals are not independently distributed
useModel(fcast_period, ...) calls FitModel's method executeUseModel
to fit model and forecast fcast_period
-step ahead future; passes on the same fitting and forecasting functions as buildmodel()