'ifelse' changes factors to character vectors (R-1.7.1, Linux):
> table(bal$soc.40)
tax noble semi-landless landless unknown
4035 5449 13342 9348 0
> blah <- ifelse(is.na(bal$soc.40), "unknown", bal$soc.40)
> table(blah)
blah
1 2 3 4 unknown
4035 5449 13342 9348 7970
How do I get what I want (I mean: simply)? Upgrade to 1.8.0?
Göran