The first example in the 'lmer' help page is the following:
(fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy))
If this does not answer your question, please provide commented,
minimal, self-contained, reproducible code with your explanation of why
and how it does not.
Hope this helps.
Spencer Graves
Fabian Scheipl wrote:
> Dear readers,
>
> Is it possible to specify a model
>
> y=X %*% beta + Z %*% b ; b=(b_1,..,b_k) and b_i~N(0,v^2) for i=1,..,k
>
> that is, a model where the random slopes for different covariates are i.i.d.,
> in lmer() and how?
>
> In lme() one needs a constant grouping factor (e.g.: all=rep(1,n)) and would
> then specify:
> lme(fixed= y~X, random= list(all=pdIdent(~Z-1)) ) ,
> that´s how it's done in the lmeSplines- documentation.
>
> Any hints would be greatly appreciated- I'm trying to write a suite of
> functions that will transform additive models into their mixed-effects
> representation like lmeSplines but using lmer() instead of lme().
>
> Thank you for your time,
> Fabian Scheipl
>
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
