Brian wrote: > In your data frames, 'y' is a category ... > The behaviour is compatible with S apart from the comment in=20 > the R help=20 > page. That categories are promoted to factors is consistent=20 > with the help for 'category'.
I have been around S and R for about 10 years, but had never heard of categories before. All information I get about categories via=20 ?category=20 in R 2.4.1 is 'category' has been an old-S function before there were factors; should be replaced by 'factor' throughout! Maybe it's time to drop this particular backwards compatibility=20 feature from rbind? Lutz > It is not a bug, but the help page could say what happens for=20 > categories. >=20 > On Fri, 23 Mar 2007, Lutz Prechelt wrote: >=20 > > I am sorry. > > Here is a minimal example: > > > > a=3Ddata.frame(x=3Dc(1:3),y=3Dunclass(factor(c(5:7)))) > > b=3Ddata.frame(x=3Dc(11:13),y=3Dunclass(factor(c(7:9)))) > > rbind(a,b) ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
