when a model is used to forecast a period what will the forecast be r ets forecast function r how many periods r how to calculate forecasts what is forecast ets r is ets forecast how to calculate ets in r how to calculate ets in r r ets forecast function ets forecast function ets forecast is r a forecast tool? how to use ets and horizon in r what is ets in r used for r forecasts how to calculate ets for forecast r r how to calculate forecasts when putting ets in r, a model will get 10 forecasts for periods 37-48? ets in r how to use what is ets forecast function