On Tue, Apr 26, 2011 at 2:28 PM, Val <valkr...@gmail.com> wrote: > Hi all, > > Assume I have a matrix > xv= [1 0 0 0 0 12, > 0 1 0 0 0 10, > * 0 0 1 0 0 -9,* > 0 0 0 1 0 20, > * 0 0 0 0 1 -5]* > > if the last column of "xv" less than 0 then I want to set zero the entire > row. > The desired output looks like the following. In this case row 3 and row 5 > are set zero. > > [ 1 0 0 0 0 12, > 0 1 0 0 0 10, > * 0 0 0 0 0 0,* > 0 0 0 1 0 20, > * 0 0 0 0 0 0*] > > I used ifelse command but did not work > > Is there another command to do that?
Yes. nc = ncol(xv) result = xv; result[ xv[, nc] <0, ] = 0 HTH, Peter ______________________________________________ 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.
