Rajarshi - Why not simply subscript your matrix X to return the rows and columns you want to keep ? For example,
new <- X[16:176, c(3,5,7,9)] assuming those are the rows and columns you want. See help("Extract"). - tom blackwell - u michigan medical school - ann arbor - On Tue, 30 Sep 2003, Rajarshi Guha wrote: > I'm trying to take a set of rows and columns out of a matrix. I hve > been using the index aray approach. My overll matrix is X and is 179 x > 65. I want to take out 4 columns and 161 rows. > > Thus I made a 161 x 2 array I and filled it up with the row,col indices. > However doing, > > X[ I ] gives me a vector of the extracted elements. Is there anyway I > can coerce this into a 161 x 4 matrix? > > ------------------------------------------------------------------- > Rajarshi Guha <[EMAIL PROTECTED]> <http://jijo.cjb.net> > GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE > ------------------------------------------------------------------- ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help