Displaying 1 result from an estimated 1 matches for "lmerpql".
2005 Aug 18
1
GLMM - Am I trying the impossible?
...We are interested in testing main effects and interaction, but the
interaction is of special interest to us.
The data for "dead" are coded as 0/1 with 1 indicating a dead fish, and
the file has one row per fish.
Some results:
lme4 (ver 0.98-1, R 2.1.1, Windows XP)
~~~~
> fish1.lmerPQL <- lmer(dead ~ Parasite * Bacteria + (1|Tank),
data=fish.data, family=binomial)
Error in lmer(dead ~ Parasite * Bacteria + (1 | Tank), data = fish.data, :
Unable to invert singular factor of downdated X'X
In addition: Warning message:
Leading minor of size 4 of downdated X'X i...