Hi: Is this what you have in mind?
m1 <- matrix(rpois(100, 10), nrow = 10, dimnames = list(NULL, paste('V', 1:10, sep = ''))) m2 <- matrix(rpois(40, 10), nrow = 10, dimnames = list(NULL, paste('V', c(2, 5, 7, 10), sep = ''))) colnames(m1) colnames(m2) m1[, colnames(m2)] HTH, Dennis On Wed, May 4, 2011 at 11:10 PM, nisha chandran <slamdunkangel...@gmail.com> wrote: > Hi, > > I have two matrices with 4885 cols and 36 cols respectively . I would like > to extract these 36 columns from the bigger matrix, the column values are > different but the column names would be the same.Hence based on the names I > would like to perform my operation. So is there any way of extracting this > info in an easy way. I have tried names,which,grep,subset none have worked. > Could someone help me out here > > > > Thanks a ton > Nisha > > [[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. > ______________________________________________ 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.