Is there a way to constrain actual forecasted output to non-negative results using ARIMA

Question

Hi,

Data-set does not have any negative values in it but when I create an ARIMA model and save the results -- at some low volume occurrences the platform will generate negative forecasts. Is there an option to "force" JMP to place a zero there instead of a the calculated negative value.

Thank you, Andy

andrew_grible · Answer

Yes, thank you

jiancao · Answer

One popular approach is to use Log transformation on the response variable as a way of restraining the fitted values to be non-negative.