> 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) Hadley -- http://had.co.nz/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
