On Wed, 18 Nov 2009 04:18:08 -0800 (PST) lloyd barcza <floyd...@yahoo.com> wrote: > I am trying to reduce the dimension of matrix by removing > zero elements and creating a sub-matrix. > > For example: > > A= [1,0,0,3; 0,1,2,0; 0,0,3,5] > > then the new matrix B would be: > > B= [1,3;1,2;3,5] > > There are the same number of zero elements in each row of A > so dimension of B will not be a problem.
This should work: B=matrix(t(A)[t(A)!=0], nrow=nrow(A), byrow=TRUE) -- Karl Ove Hufthammer ______________________________________________ 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.
