On Thu, Feb 4, 2010 at 12:03 PM, Hadley Wickham <had...@rice.edu> wrote: >> I'd propose the following: If the sets of levels of all arguments are the >> same, then c.factor() would return a factor with the common set of levels; >> if the sets of levels differ, then, as Hadley suggests, the level-set of the >> result would be the union of sets of levels of the arguments, but a warning >> would be issued. > > I like this compromise (as long as there was an argument to suppress > the warning)
If I provided code to do this, along with the warnings for ordered factors and using the optimisation suggested by Matthew, is there any member of R core would be interested in sponsoring it? Hadley -- http://had.co.nz/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
