y <- 2 - (x[,1] > x[,2]) you can also do
cbind(x,y) if you wish. --- On Fri, 1/8/08, Gundala Viswanath <[EMAIL PROTECTED]> wrote: > From: Gundala Viswanath <[EMAIL PROTECTED]> > Subject: [R] Grouping Index of Matrix Based on Certain Condition > To: [EMAIL PROTECTED] > Received: Friday, 1 August, 2008, 1:00 PM > Hi, > > I have the following (M x N) matrix, where M = 10 and N =2 > What I intend to do is to group index of (M) based on this > condition > of "x_mn" , namely > > For each M, > If x_m1 > x_m2, assign index of M to Group1 > otherwise assign index of M into Group 2 > > > > x > [,1] [,2] > [1,] 4.482909e-01 0.55170907 > [2,] 9.479594e-01 0.05204063 > [3,] 8.923553e-01 0.10764474 > [4,] 9.295003e-01 0.07049966 > [5,] 8.880434e-01 0.11195664 > [6,] 9.197367e-01 0.08026327 > [7,] 9.431232e-01 0.05687676 > [8,] 9.460356e-01 0.05396442 > [9,] 6.053829e-01 0.39461708 > [10,] 9.515173e-01 0.04848268 > > Is there a simple way to do it in R? > - Gundala Viswanath > Jakarta - Indonesia > > ______________________________________________ > 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. ______________________________________________ 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.
