Troels,
I think the problem is just that most of the plotting functions of nlme
make heavy use of Trellis graphics (See paragraphs "Description",
"Form"
and so on in help(qqnorm.lme)). Trellis devices are not supported by R.
Uli Flenker
Institute of Biochemistry
German Sports University Cologne
Carl-Diem-Weg 6
50933 Cologne / Germany
Phone 0049/0221/4982-493
On Tue, 4 Jul 2000, Troels Ring wrote:
> Dear friends. Below is ouput directly from the help on qqnorm.lme.html
> It do not seem to work as expected - on win98, R 1.1, although the
> regression is undertaken, so qqnorm
> misunderstands, or what ?
>
> library(nlme)
> data(Orthodont)
> fm1 <- lme(distance ~ age, Orthodont, random = ~ age | Subject)
> # normal plot of standardized residuals by gender
> qqnorm(fm1, ~ resid(., type = "p") | Sex, abline = c(0, 1))
> Error in as.double.default(y) : (list) object cannot be coerced to vector
> type 14
> # normal plots of random effects
> qqnorm(fm1, ~ranef(.))
> Error in as.double.default(y) : (list) object cannot be coerced to vector
> type 14
>
>
> Best wishes
>
> Troels
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