<html>
Dear friends. Below is ouput directly from the help on
qqnorm.lme.html<br>
It do not seem to work as expected - on win98, R 1.1, although the
regression is undertaken, so qqnorm<br>
misunderstands, or what ?<br>
<br>
library(nlme) <br>
data(Orthodont)<br>
fm1 <- lme(distance ~ age, Orthodont, random = ~ age | Subject)<br>
# normal plot of standardized residuals by gender<br>
qqnorm(fm1, ~ resid(., type = "p") | Sex, abline = c(0,
1))<br>
<b><i>Error in as.double.default(y) : (list) object cannot be coerced to
vector type 14<br>
</i></b># normal plots of random effects<br>
qqnorm(fm1, ~ranef(.))<br>
<b><i>Error in as.double.default(y) : (list) object cannot be coerced to
vector type 14<br>
<br>
<br>
</i></b>Best wishes<br>
<br>
Troels</html>