[R] Indexing on a variable that is a factor
p.dalgaard at biostat.ku.dk
Sat Sep 9 19:08:39 CEST 2006
"Farrel Buchinsky" <fjbuch at gmail.com> writes:
> It is easy to index on numeric variables.
> How does one index on a variable that is a factor?
Er, same way. Unless you attach some novel meaning to "index on".
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