[R] transforming character categories

[Gabor Grothendieck]

Or use the labels= argument of factor.

On Sun, Jun 28, 2009 at 8:06 AM, Peter Dalgaard<p.dalgaard at biostat.ku.dk> wrote:
> 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=...)
>
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