[R-sig-ME] weights in lmer_0.999375-23
Sundar Dorai-Raj
sundar.dorai-raj at pdf.com
Tue Aug 5 00:25:57 CEST 2008
Hi, Prof. Bates (and others),
It seems that in the latest version of lme4 from CRAN or R-forge the
weights argument does not work:
library(lme4)
set.seed(1)
w <- abs(rnorm(nrow(sleepstudy)))
fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy)
fm2 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy, weights = w)
Error in mer_finalize(ans, verbose) :
Calculated PWRSS for a LMM is negative
> sessionInfo()
R version 2.7.1 (2008-06-23)
i386-pc-mingw32
locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] lme4_0.999375-23 Matrix_0.999375-12 lattice_0.17-12
loaded via a namespace (and not attached):
[1] grid_2.7.1 tools_2.7.1
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