Dear all, Suppose that I have a matrix A
A <- matrix(c(3,3,3,3,3,3,3,3,3),3,3) and a logical matrix B B <- matrix(c(T,T,T,F,T,T,F,T,F),3,3) The result matrix should be C <- matrix(c(3,3,3,NA,3,3,NA,3,NA),3,3) Is there any simple tip or trick to perform this without looping? Thanks in advance for any suggestion. Best regards, Andrej ______________________________________________ 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.
