How can id do this efficiently in R ? 1 0 0 0 2 0 0 0 3
rotate right 0 0 1 0 2 0 3 0 0 rotate left 0 0 3 0 2 0 1 0 0 What I want to do is described here: http://stackoverflow.com/questions/13049575/r-min-max-and-mean-of-off-diagonal-elements-in-a-matrix but I want do to it for all off-anti-diagonals. I am also concerned that the method described on stackoverflow isn't necessarily efficient. I work with matrices of size 3k * 3k. -- Witold Eryk Wolski ______________________________________________ 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.
