Can you please help me how to write the codes? Let's say I have an ARIMA model (2,0,1) and the coefficients are as below: AR1=0.5 AR2=0.8 MA1=3.5 I want to generate the forecast with confidence level for 0.5, 0.7, and 0.9, can the below codes work? proc arima data=mydata; identify var=hist; estimate ar=0.5 0.8 ma=3.5 noest; forecast id=date interval=month lead=12 alpha=0.5 out=myoutput; run; Thank you.
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