If I understand what you mean, just recode them.
z <- factor(letters[1:3])
z
zz <- factor(ifelse( z %in% c("a", "b"),"d" ,z))
zz
Cheers,
Bert
On Fri, Aug 9, 2013 at 7:10 AM, Claus O'Rourke <claus.orou...@gmail.com> wrote:
> Hello R-Help,
> I have a variable with > 32 levels and I'd like to split this into two
> variables such that both new variables have >= 32 variables. This is
> to handle the limit of 32 level predictor variables in R's Random
> Forest implementation. Might someone be able to suggest an elegant way
> to do this? I've tried googling for this, but haven't hit the right
> search terms.
>
> Regards
>
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--
Bert Gunter
Genentech Nonclinical Biostatistics
Internal Contact Info:
Phone: 467-7374
Website:
http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm
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