Hi aegea, Here is one:
m <- structure(c(6, 5, 20, 7, 8, 25, 14, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 6, 7), .Dim = c(7L, 3L)) m1 <- m[m[,1] >= m[,2], ] m1 m2 <- m[m[,1] < m[,2], ] m2 Best, Jorge On Thu, Dec 3, 2009 at 10:12 PM, aegea <> wrote: > > Hello, > > I am working on seperate the matrix to two matrices but got trouble on > doing > it. Please give me some suggestions on doing this. Thanks a > looooooooooooot! > > My original matrix m is as follows for example, > > [,1] [,2] [,3] > [1,] 6 8 1 > [2,] 5 9 2 > [3,] 20 10 3 > [4,] 7 11 4 > [5,] 8 12 5 > [6,] 25 13 6 > [7,] 14 14 7 > > I want to generate two matrix m1 and m2 > if m[i, 1] <m[i,2], then the row is stored in new matrix m1, (i =1, ..., 7) > if m[i,1]>=m[i,2], then the row is stored in new matrix m2. > > m1 supposed to be like: > [,1] [,2] [,3] > [1,] 6 8 1 > [2,] 5 9 2 > [3,] 7 11 4 > [4,] 8 12 5 > > m2 supposed to be like: > [,1] [,2] [,3] > [1,] 20 10 3 > [2,] 25 13 6 > [3,] 14 14 7 > > > How can I code the if statement? Thank you very much > > -- > View this message in context: > http://n4.nabble.com/how-to-seperate-a-matrix-tp948225p948225.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. > [[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.
