Message-ID: <loom.20101204T050549-889@post.gmane.org>
Date: 2010-12-04T04:07:40Z
From: Ben Bolker
Subject: knowing the code-number of factors in a vector
Eduardo Klein <eklein <at> usb.ve> writes:
> I would like to know how R assigns the numeric code to a set of factors
> in a vector.
[snip]
>
It is indeed alphabetical by default. To get it in order of
appearance you could do something like
set.seed(1001)
x <- sample(letters[1:5],50,replace=TRUE)
f <- factor(x,levels=unique(x))