I'm just learning and this is probably very simple, but I'm stuck. I'm trying to understand the by(). This works. by(TestData, LEAID, summary)
But, This doesn't. by(TestData, LEAID, median(RATIO)) ERROR: could not find function "FUN" HELP! Thanks, LA -- View this message in context: http://n4.nabble.com/by-function-tp955789p955789.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
