> auto.arima(q)
Series: q
ARIMA(2,1,2)(2,0,1)[12]
Coefficients:
ar1 ar2 ma1 ma2 sar1 sar2 sma1
0.3005 0.3459 -0.3097 -0.5883 0.1845 0.1506 -0.0488
s.e. 0.1885 0.1762 0.1662 0.1657 0.2706 0.0749 0.2710
sigma^2 estimated as 0.0002057: log likelihood=813.85
AIC=-1611.7 AICc=-1611.18 BIC=-1582.43
> m1<-arima(q,order=c(2,1,2), seasonal=list(order=c(2,0,1), period=12))
> forecast(m1,h=20)
Error in ts(x) : 对象不是矩阵


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