Hi,
I am trying to get bootstrap confidence intervals on variance components and related statistics. To calculate the variance components I use the package lme4.
> off.fun <- function(data, i){
d <- data[i,]
lme1<- lmer(y ~ trt + (trt-1|group), d)
VarCorr(lme1)@reSumry$group[2,1] #just as an example
}
> off.boot <- boot(data=data.sim, statistic=off.fun, R=100)If I choose small values of R (<10) then I get very reasonable results but for large R I get the following error massage:
*** malloc: vm_allocate(size=1069056) failed (error code=3)
*** malloc[682]: error: Can't allocate region
Error in .local(x, ...) : Calloc could not allocate (48 of 8) memory
Can anyone tell me why I get this error massage and what I can do to avoid this problem?
Thank you very much for your help!
Thomas
I am working with: R 2.1.0 boot 1.2-22 lme4 0.95-6 Matrix 0.95-7 lattice 0.11-6 latticeExtra 0.1-1
On Mac OS X 10.3.9
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