[R] question on lmList

[Dieter Menne]

eugen pircalabelu <eugen_pircalabelu <at> yahoo.com> writes:

> Using the lmList function from “nlme package” I get the following error 
>> message: 
> 
> “Error in !unlist(lapply(sum.lst, is.null)) : invalid argument type”
> 

try str(zz) to check if your data are strange. And plot the data, maybe there is
something funny in the data set. Also try traceback() after the error occurred,
this could give you a hint what's wrong.

Dieter