how to input real data into arima model?
I am a beginner of arima, and wanna ask some question
after I found the arima (1,0,1) coefficients, how can I actually use them into real data like below in excel:
I've read many of the articles, they only provide the original algebra equation,
something like this, which I wanna know is how to use in pratical.
If I am gonna predict the price of date 15, which column should multiply which coefficient to make the result come out?
Thanks very much