Thanks sir for your reply. Unfortunately I couldn't figure out the solution.
Vincy --- On Sat, 3/12/11, Dennis Murphy <djmu...@gmail.com> wrote: From: Dennis Murphy <djmu...@gmail.com> Subject: Re: [R] Identifying unique pairs To: "Vincy Pyne" <vincy_p...@yahoo.ca> Cc: r-help@r-project.org Received: Saturday, March 12, 2011, 11:45 AM Hi: This problem came up the other day - see http://stats.stackexchange.com/questions/7884/fast-ways-in-r-to-get-the-first-row-of-a-data-frame-grouped-by-an-identifier/7985#7985 Dennis On Sat, Mar 12, 2011 at 3:20 AM, Vincy Pyne <vincy_p...@yahoo.ca> wrote: Dear R helpers Suppose I have a data frame as given below mydat = data.frame(x = c(1,1,1, 2, 2, 2, 2, 2, 5, 5, 6), y = c(10, 10, 10, 8, 8, 8, 7, 7, 2, 2, 4)) mydat x y 1 1 10 2 1 10 3 1 10 4 2 8 5 2 8 6 2 8 7 2 7 8 2 7 9 5 2 10 5 2 11 6 4 unique(mydat$x) will give me 1, 2, 5, 6 i.e. 4 values and unique(mydat$y) will give me 10, 8, 7, 2, 4. What I need is a data frame where I will get a vector (say) x_new as (1, 2, 2, 5, 6) and corresponding y_new as (10, 8, 7, 2, 4). I need to use these two vectors viz. x_new and y_new seperately for further processing. They may be under same data frame say mydat_new but I should be able to access them as mydat_new$x_new and similarly for y. I tried following way. pp = paste(mydat$x, mydat$y) pp = > pp [1] "1 10" "1 10" "1 10" "2 8" "2 8" "2 8" "2 7" "2 7" "5 2" "5 2" "6 4" qq = unique(pp) > qq [1] "1 10" "2 8" "2 7" "5 2" "6 4" So I get the desired pairs, but I want each element of pair in two columns seperately as x_new y_new 1 10 2 8 2 7 5 2 6 4 Kindly guide Vincy [[alternative HTML version deleted]] ______________________________________________ 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. [[alternative HTML version deleted]]
______________________________________________ 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.
