On Oct 30, 2012, at 11:59 AM, Haris Rhrlp wrote: > Dear R users, > > I want a help to write an algorithm for swapping rows and columns in a matrix >
This will "shuffle" columns, although 'randomly permute' is the more common word for this;operation: set.seed(123) mat[, sample(dim(mat)[2] ] This will swap rows: set.seed(123) mat[ sample(dim(mat)[1], ] -- David Winsemius, MD Alameda, CA, USA ______________________________________________ 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.
