Thanks, I’ve read the article. Basically, three methods are mentioned. Recursive method and simpler methods, Exponential Smoothing and the Holt-Winters method. They assumes forecasting functions optimal for some models such as ARIMA(0,1,1), IMA(2,2) etc. Recursive model seems appropriate but I’d like to try all three methods. However, i still don’t know how to use the SuanShu for forecasting.