Sorry, no - you will have to do something like the latter suggestion. Regards Søren
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Alexander Shenkin Sent: 2. april 2012 17:59 To: [email protected] Subject: [R] summaryBy: transformed variable on RHS of formula? Hi Folks, I'm trying to cut my data inside the summaryBy function. Perhaps formulas don't work that way? I'd like to avoid adding another column if possible, but if I have to, I have to. Any ideas? Thanks, Allie require(doBy) df = dataframe(a <- rnorm(100), b <-rnorm(100)) summaryBy(a ~ cut(b,c(-100,-1,1,100)), data=df) # preferred solution, but it throws an error # Error in `[.data.frame`(data, , rh.var, drop = FALSE) : undefined columns selected df$c = cut(b,c(-100,-1,1,100)) summaryBy(a ~ c, data=df) # works fine ______________________________________________ [email protected] 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. ______________________________________________ [email protected] 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.
