[R] sas vs r

[Liliana Forzani]

I have a code in sas (NLMIXED) and I have a hard time converting to r

1)it is poisson, with random intercept, but
it have an offset.  Means, I do not want one of the coefficient to be
estimate. Means, may model is

g(mean) = beta X + Z,

Z fixed, X fixed and beta to be estimate

I am using glmmML.

2) the same but I have random slope (and I think with glmmML I can use
only random intercept)

3) I try to use nlme, is this "equivalent" to NLMIXED? thanks in advance

Liliana Forzani