Exercise

Calculating residuals from regression

Your previous model that predicts the log of sales from the log of price along with holiday and promotion effects is saved in the model_MET_hi_full object. Your data frame that has the data that built this model is in the object MET_hi_train. Now let's see where we went wrong.

Instructions

100 XP

Calculate the residuals from the this model and save as MET_hi_full_res.
Convert these residuals into an xts object. Remember your dates are stored as dates_train.

Take Hint (-30 XP)