This is about package 'lme4' and strictly speaking would not
belong to R-bugs.
But you have reported a bug indeed; thank you.
>>>>> "s" == susscorfa <[EMAIL PROTECTED]>
>>>>> on Thu, 7 Aug 2008 12:20:41 +0200 (CEST) writes:
s> Full_Name: susscorfa Version: 2.7.1 OS: ubuntu Submission
s> from: (NULL) (129.125.177.31)
s> Incorrect implementation of the grouping variable in the
s> function glmer crashes R
{the correct term is "segmentation fault" or "segfault"}
s> a small example:
s> require(lme4);
s> a<-data.frame(b=rpois(1000,10), c=gl(20,50), d=rnorm(1000,3),
e=rnorm(1000,5),
s> f=rnorm(1000,2)+5);
s> glmer(b~d+f|c+(e), family=poisson, data=a)
Yes, indeed this segfaults; similarly for lmer().
The development version of the 'lme4' package (on R-forge) no
longer does so since a few minutes ago.
s> It crashes R on debian linux (2 independant systems) as well as windows
s> The correct function usage is:
s> glmer(b~d+f+(e|c), family=poisson, data=a)
s> I suppose it should just eveluate as wrong usage of a
s> function but should not crash R
Yes, it now gives an error message about the incorrect
specification.
Martin Maechler, ETH Zurich
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