> 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. Best, Torsten
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