You can easily calculate the RMSE errors and also some other errors like Mean Percentage error (MPE) by using the accuracy function. ex: If the name of your model is name then RMSE is calculated as : accuracy(name) which will give: ME RMSE MAE MPE MAPE MASE ACF1 Training set 0.05576569 8.313739 6.227064 395.7271 576.6584 0.5128541 -0.09583192
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