Hello! Could you please explain why the first 5 lines work but the last 2 lines don't? Thank you!
by(data = iris[myvars], INDICES = iris["Species"], FUN = summary) by(data = iris[myvars], INDICES = iris["Species"], FUN = sum) by(data = iris[myvars], INDICES = iris["Species"], FUN = var) by(data = iris[myvars], INDICES = iris["Species"], FUN = max) by(data = iris[myvars], INDICES = iris["Species"], FUN = min) by(data = iris[myvars], INDICES = iris["Species"], FUN = sd) by(data = iris[myvars], INDICES = iris["Species"], FUN = mean) -- Dimitri Liakhovitski ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
