Exercise

Calculate bottom-up forecast for whole region

Perfect! Now you have a forecast for the high value product in the metropolitan region in the object pred_MET_hi_xts (the regression was the best) and a forecast for the specialty product in the object for_MET_sp_en (the ensemble was the best). I have also forecasting the low value product in the region for you and the forecast is in the object pred_MET_lo_xts (the regression was the best). Now you can build a bottom-up forecast of the whole metropolitan region!

Instructions

100 XP

Add the three forecasts of each product defined above to build the whole region sales forecast.
Calculate the MAPE of this total forecast compared to the validation data set MET_t_v.