ARIMA samae forecasts across horizons

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Shaoni Nandi
Shaoni Nandi 2020-4-14
评论： BN 2022-11-18
Why is it that I get the same forecasts for all forecasting horizons in MATLAB?
Mdl = arima('Constant',1,'AR',{0.3});
Mdl.Variance = 1
[Y,E]=simulate(Mdl,20);
Mdl1=arima(1,0,0);
e=estimate(Mdl1,Y);
forecast(e,10)
ans =
1.3642
1.3642
1.3642
1.3642
1.3642
1.3642
1.3642
1.3642
1.3642
1.3642

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