Hi Julio, On Tue, Apr 16, 2013 at 1:51 PM, Julio Sergio <julioser...@gmail.com> wrote: > I thought I've understood the 'order' function, using simple examples like: > > order(c(5,4,-2)) > [1] 3 2 1 > > However, I arrived to the following example: > > order(c(2465, 2255, 2085, 1545, 1335, 1210, 920, 210, 210, 505, 1045)) > [1] 8 9 10 7 11 6 5 4 3 2 1 > > and I was completely perplexed! > Shouldn't the output vector be 11 10 9 8 7 6 4 1 2 3 5 ? > Do I have a damaged version of R?
Your version of R is fine; your understanding is damaged. :) order() returns the element indices for each position. So in your example, the sorted version of the vector would have element 8 in the first place, element 9 in the second place, and element 1 in the last place. order() is not the same as rank(). See: x <- c(2465, 2255, 2085, 1545, 1335, 1210, 920, 210, 210, 505, 1045) order(x) x[order(x)] rank(x) # what you seem to expect Sarah -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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.
