On 4/24/2007 4:58 AM, Torsten Hothorn wrote:
>> nlevels(c("a", "b"))
> [1] 0
>
> but the documentation in R 2.5.0 (and earlier) says
>
> If the argument is not a 'factor', 'NA' is returned.
>
> I hope it isn't too late, I only came across this in a lecture this
> morning.
It's too late for 2.5.0, but not for 2.5.1, or 2.6.0, ...
Just to be clear: this is a documentation error, right? The behaviour
is unchanged back at least as far as 2.2.1.
Duncan Murdoch
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