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I have a successful covariate ARIMA model with a key variable and one other predictor variable. I have also successfully used an ARIMA and TS forecast just on the single key variable. I now want to use the TS covariate forecast tool to forecast the key variable also using the additional predictor variable. What I don't know is how to format future data for the predictor.
The base data has the following fields:
3) Volume (Key variable)
4) Price (predictor)
what do I put into the additional input file? Do I need to populate region, date (with future dates) and of course Price and leave volume blank, or do I only need the price data for the number of forecasted periods? I have included raw data file and workflow example for your knowledge and examination. I’m not sure I am doing this quite right as results don’t seem to vary when I change forecasted price