Hi !
I try to run such simple code:
Mdl = arima(2,0,2);EstMdl = estimate(Mdl,train_set,'Display','off');
where "train set" is just vector of some values. For most vectors everything works perfect BUT for some of them I get error
"The non-seasonal autoregressive polynomial is unstable.'.
Why ? What this error means ? How to fix it ?
Thank you in advance for your help ! 🙂
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