All,
Some trial and error follows ( for anyone who cares ).
The case seems that groupedData does not like
to have both "a grouping" and "an outher" defined at the same time.
library(nlme)
d.x <- read.table(header=TRUE, text="
o g h i d
A C E G 1.0
A C E H 2
A C F G 4
A C F
SUMMARY
---
Using package nlme, I am getting the following warning
when I try to create a grouped data object using groupedData().
I believe that my logic is faulty.
Warning message:
In `levels<-`(`*tmp*`, value = if (nl == nL) as.character(labels) else
paste0(labels, :
duplicated level
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