I would like to estimate an ARIMA model (using the fable package), say ARIMA(1,1,0). How do I make R also to estimate the drift element? To fit an ARIMA model, the code is
DataSetName |> model(model.arima = ARIMA(TimeSeriasName ~ pdq(1,1,0))
How do I add drift to this estimation?
DataSetName |> model(model.arima = ARIMA(TimeSeriasName ~ pdq(1,1,0) + drift() )
gives the error:"[1] could not find function "drift""
Many thanks!