Dear all, I just want to order a matrix using several columns in a matrix. For example:
x <- matrix(sample(c(1:5), 60, replace = T), 10, 6). If I order the matrix by the first two columns, I will do it like this: x[order(x[, 1], x[, 2]), ]. But when I repeat this work many times and the columns will change each time in a simulation study, how can I assign the arguments of order()? For example, in the first iteration, the columns needing to order is the first two columns, in the second iteration, the columns needing to order is the first, second, and fourth column? …. I would appreciate any help on this question. Thanks a lot. Lisa -- View this message in context: http://r.789695.n4.nabble.com/Order-a-matrix-tp3547923p3547923.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
