[Rd] suggestion for extending ?as.factor
savicky at cs.cas.cz
Tue May 12 13:17:15 CEST 2009
On Mon, May 11, 2009 at 05:06:38PM +0200, Martin Maechler wrote:
> The version I have committed a few hours ago is indeed a much
> re-simplified version, using as.character(.) explicitly
The current development version (2009-05-11 r48528) contains
in ?factor a description of levels parametr
levels: an optional vector of the values that 'x' might have taken.
The default is the unique set of values taken by
'character(x)', sorted into increasing order _of 'x'_. Note
that this set can be smaller than 'sort(unique(x))'.
I think that 'character(x)' should be 'as.character(x)'.
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