[Rd] nlevels(<no factor>) is 0 and not NA
murdoch at stats.uwo.ca
Tue Apr 24 13:27:47 CEST 2007
On 4/24/2007 4:58 AM, Torsten Hothorn wrote:
>> nlevels(c("a", "b"))
>  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
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.
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