wang cheng <cheng_wang29 <at> yahoo.com.cn> writes:
>
> Hello:I run a gamm with following call
> :mode<-gamm(A~B,random=list(ID=~1),family=gaussian,na.action=na.omit,data=rs)
an error
> happened:ERROR names(object$sp) <- names(G$sp) : attempt to set an
attribute on NULL
with mgcv version 1.7-3
What so? How can I correct the Error? Thanks very much for any help.
>
Thank you for telling us that you are using a function within a
contributed package, but ...
Please read the posting guide. We are unlikely to be able to
help without a reproducible example, unless you happen to have
encountered a very common error.
Update: I was able to guess what your problem was and create
my own reproducible example. You have specified a generalized
additive mixed model (GAMM) without any smooth terms, which means
that you really don't need gamm (or the mgcv package in general)
to do the problem.
rs <- data.frame(A=1:20,B=1:20,ID=rep(1:2,each=10))
> gamm(A~B,random=list(ID=~1),family=gaussian,na.action=na.omit,data=rs)
Error in names(object$sp) <- names(G$sp) :
attempt to set an attribute on NULL
You could run the model you have requested via
library(nlme)
lme(A~B,random=~1|ID,na.action=na.omit,data=rs)
good luck
(it would still be a good idea to read the posting guide,
for future reference!)
Ben Bolker
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