Spencer Graves wrote >>I don't know how to prevent aggregate from making factors of everything, >>but the following shows how to cast them back into what you want: .... > DF.$bch <- as.character(DF.$b) > DF.$dn <- as.numeric(as.character(DF.$d)) > sapply(DF., class) ...
---- help(factor) suggests: "To �revert� a factor f to its original numeric values, as.numeric(levels(f))[f] is recommended and slightly more efficient than as.numeric(as.character(f)). " And in package Hmisc there is a function "summarize" that does not touch non-factors. Dieter Menne ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
