| Detailed description |
According to the documentation, a character vector can be supplied as a split criterion. However, then the element spl.gr of the output object is broken.
# MWE:
library(eRm)
dat = matrix(sample(0:3,1000,TRUE),200,5)
mod = PCM(dat)
grp = rep(c("a","b","c","d"),each=50) # character vector
tst = LRtest(mod,splitcr=grp)
tst$spl.gr # ???
# However, it works if we use a factor (thanks to Marco J. Maier for the hint)
grp = factor(rep(c("a","b","c","d"),each=50)) # must be a factor!
tst = LRtest(mod,splitcr=grp)
tst$spl.gr # :-)
[1] "grp a" "grp b" "grp c" "grp d"
|
|
