I used to be able to use variance for fun.aggregate, but since I upgraded from R 2.6 to 2.7 (Ubuntu hardy to intrepid), it no longer works.
> library("reshape") > data("french_fries") > ffm <- melt(french_fries, id=1:4, na.rm = TRUE) > cast(ffm, rep ~ treatment, length) rep 1 2 3 1 1 579 578 575 2 2 580 579 580 > cast(ffm, rep ~ treatment, mean) rep 1 2 3 1 1 3.207772 3.177336 3.024522 2 2 3.181207 3.115544 3.277759 > cast(ffm, rep ~ treatment, var) Error in fun.aggregate(data$value[0]) : 'x' is empty Any ideas? ______________________________________________ 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.