[R] lme library

[roberta_varriale at ds.unifi.it]

Dear authors,
I’m an Italian PhD student and I’m dealing with linear mixed models.

I’d like to use your lme library, but I have a problem.

I’m able to estimate a null model.
For example, using SAS data, I can estimate the model:
lme(y ~ 1, data = Mississippi, random = ~ 1|influent, method="ML")

As suggested in the literature I want to “test” the significance of the
second level variance. So, I would like also to estimate a linear model
without random effects. Is it possible with your library?
In the description of the function lme I found that the random part is
optional, but I don't know how to remove it.

I tried also other R functions (as glm, lme, etc), but I don’t find any
function that implements the models with the method “ML”.

Can you help me, please?

Really thanks for you help,
Bests
Roberta Varriale


Ps I prefer your new look!