Dear All, Let ab is the combination of matrices a and b.
a <- matrix(c(1,2,3,4), nrow = 2, ncol = 2) b <- matrix(c(4,3,1,2), nrow = 2, ncol = 2) ab <- rbind(a, b) >From matrix ab, could someone give some advice on the way to sort all elements >in column 2, by the sequence of the elements in column 1 in ascending order? Thank you. Fir ______________________________________________ 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.
