Hello I am trying to compare a vector with a Matrix's rows.The vector has the same length as the number of columns of the matrix, and I would like to find the row numbers where the matrix's row us the same as the given vector. What I am doing at the moment is using apply as follows:
apply(Matrix,1,function(x)all(x%in%LHS)) but this isn't too fast actually. I would like to know if any body knows an efficient (fast) way of doing this? The matrix contains stings (not numbers). Thank you Felipe Parra [[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.