Hi, The rows of a data frame can be sorted lexicographically as shown in this example,
my.df <- data.frame(x=c(1,1,1,2,2), y=c(1,2,3,2,1)) my.df[order(my.df$x,my.df$y, decreasing=TRUE), ] however, I'm wondering if it's possible to pass a variable in as the first argument to order() so that the actual set of columns used in the sort can be easily varied? FWIW, the first argument to order() is of type "..." and page 2 of R Language Manual says that "Users cannot easily get hold of objects of" this type. Many thanks for any ideas! Cheers, Dave ______________________________________________ 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.
