[R] matrix algebra for constructing a special matrix?

Dear R-users, would it be a better way to construct the matrix below without using any for-loop or model.matrix? preferably with some matrix algebra? Thanks in advance, Carlo Giovanni Camarda ## dimensions m - 3 n - 4 mn - m*n k - m+n-1 ## with a for-loop X - matrix(0, mn, k) for(i in 1:n){

Re: [R] matrix algebra for constructing a special matrix?

Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Camarda, Carlo Giovanni Sent: Friday, October 26, 2012 8:13 AM To: r-h...@stat.math.ethz.ch Subject: [R] matrix algebra for constructing a special matrix? Dear R-users, would it be a better way