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2003 Apr 14
1
Problem with nlme or glmmPQL (MASS)
...in a multilevel analysis,
using glmmPQL from MASS. This occurs with bothj rw1062 and r-devel,
respectively with nlme versions 3.1-38 and 3.1-39 (windows XP).
> S817.mod1 <- glmmPQL( S817 ~ MIEMBROScat+S901+S902A+S923+URBRUR+REGION+
+
S102+S103+S106A+S108+S110A+S109A+S202+S401+S557A+S557B+
+ YHOGFcat, data=Hogares, random= ~1,
family=binomial,
+ na.action=na.omit)
iteration 1
Error in getGroups.data.frame(dataMix, groups) :
Invalid formula for groups
> getGroupsFormula(Hogares)
~ID08
Hogares is a groupedData object. The o...