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2009 Mar 19
1
How to keep attributes when dropping factor levels?
Dear All,
to drop unused factor levels two ways are outlined in R-help. In both
cases a label attribute is lost.
The same happens, when using car:::recode.
Is there a simple way to avoid losing attributes?
Thanks,
Heinz
## example
ff <- factor(substring("statistics", 1:10, 1:10), levels=letters)
attributes(ff)$label <- 'test label'
attributes(ff)$label
gg <- ff[,