Hi, Suppose I have the following two matrices.> x=matrix(1:4,nr=2) > y=matrix(5:8,nr=2)I want to join the two matrices to get the following two new matrices. I did a search but I don't find any relevant webpage. Can somebody let me know how to do it? [,1] [,2] [1,] 1 3 [2,] 2 4 [3,] 5 7 [4,] 6 8 [,1] [,2] [,3] [,4] [1,] 1 3 5 7 [2,] 2 4 6 8 Regards, Peng
On Sep 4, 2009, at 6:26 PM, Peng Yu wrote:> Hi, > > Suppose I have the following two matrices. >> x=matrix(1:4,nr=2) >> y=matrix(5:8,nr=2) > > I want to join the two matrices to get the following two new matrices. > I did a search but I don't find any relevant webpage. Can somebody let > me know how to do it? > > [,1] [,2] > [1,] 1 3 > [2,] 2 4 > [3,] 5 7 > [4,] 6 8?rbind> > [,1] [,2] [,3] [,4] > [1,] 1 3 5 7 > [2,] 2 4 6 8?cbind These are pretty basic questions. What introductory documents are you working with that don't describe rbind and cbind at an early stage of matrix operations? David Winsemius, MD Heritage Laboratories West Hartford, CT
Hi Peng, Try rbind(x,y) cbind(x,y) HTH, Jorge On Fri, Sep 4, 2009 at 6:26 PM, Peng Yu <pengyu.ut@gmail.com> wrote:> Hi, > > Suppose I have the following two matrices. > > x=matrix(1:4,nr=2) > > y=matrix(5:8,nr=2) > > I want to join the two matrices to get the following two new matrices. > I did a search but I don't find any relevant webpage. Can somebody let > me know how to do it? > > [,1] [,2] > [1,] 1 3 > [2,] 2 4 > [3,] 5 7 > [4,] 6 8 > > [,1] [,2] [,3] [,4] > [1,] 1 3 5 7 > [2,] 2 4 6 8 > > Regards, > Peng > > ______________________________________________ > 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]]