That's discussed in Pinhiero and Bates, Mixed Effects Models in S and S-Plus. I don't have the book in my hand now, so I can't tell you exactly where to find it. However, I'm pretty confident that it can be done in "lme".

Spencer Graves

Gregory BENMENZER wrote:
Dear all,

I'm looking for how can I estimate a linear model with ar(ma) errors :

y(t)=a*X(t)+e(t) with
P(B)e(t)=Q(B)u(t)

where u is a white noise and P, Q are some polynomes.

Could you help me ?

Gr�gory Benmenzer

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