Rolf Turner wrote:
> I have factors with levels ``Unit", "Achieved", and "Scholarship"; I
> wish to replace these with
> "U", "A", and "S".
>
> So I do
>
> fff <- factor(fff,labels=c("U","A","S"))
>
> This works as long as all of the levels are actually present in the
> factor. But if ``Scholarship'' is absent
> (as if often is) then I get an error.
>
> I can do a workaround such as
>
> fff <- factor(c("U","A","S")[fff],levels=c("U","A","S"))
>
> but this seems kludgy to me.
>
Does it even work? (What if it is the first or the 2nd level that is
absent?)
The canonical way is
factor(fff, levels=c("Unit", "Achieved", "Scholarship"),
labels=c("U","A","S"))
> Is there a sexier way?
>
> cheers,
>
> Rolf Turner
>
--
O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
