which function can you use when you have a non negative period? how to deal with a negative period in ts forecast when can the model deal w period when estimating period when estimating period, what is done? when to use ets in forecast how to deal with non negative period how do you do period estimating when do you use ets for seasonal forecast when you use the ts model you see which is the correct period for ets what are estimating periods of time when to use ts in forecast analysis how to use the ts model when there is a non negative period? estimating period in ts how to use period in forecasting is seasonality the correct period when using ts in forecasting, which one does the forecast work with when do i use a ts model to forecast seasonality when estimating period ts model