[R] transforming character categories

[Peter Dalgaard]

Gabor Grothendieck wrote:
> If you only want to convert them to unique numbers then
> 
> as.numeric(factor(x))
> 
> will do that.

Or, use it directly for indexing, as in c(1000,2500,4173,3700)[factor(x)]

DEPENDING on LEVEL ORDER, mind you! So make sure you know what the order 
is or set it yourself using factor(x, levels=...)

-- 
    O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
   c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
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