S??ren H??jsgaard wrote:> Dear all,
> Under version 2.0.0, I get the error below when calling summary() on a
lme-object, whereas it works under version 1.9.1 (well, it did last week, before
I upgraded). Any help on this?
> Thx in advance
> S??ren
>
>
>>library(nlme)
>>mf <- formula(Weight~Cu*(Time+I(Time^2)+I(Time^3)))
>>lme1 <- lme(mf, data = dietox, random=~1|Pig)
>>summary(lme1)
>
> Linear mixed-effects model fit by REML
> Data: dietox
> AIC BIC logLik
> 4748.664 4815.081 -2360.332
>
> Random effects:
> Formula: ~1 | Pig
> (Intercept) Residual
> StdDev: 6.360083 3.116751
>
> Fixed effects: Error in as.vector(x, "list") : cannot coerce to
vector
I can't reproduce this problem on a simple example like
library(nlme)
example(lme)
summary(fm1)
Can you give us more information on your platform, the version of nlme,
and perhaps make the data set available on the Internet so we can try to
reproduce the problem?
Just as a guess, do you happen to have the lme4 package loaded before
loading nlme? The two packages cannot be loaded simultaneously. This
is detected if you load them in the order nlme, lme4 but not if you load
them in the other order.