On 6/2/05, Stefan Mischke <[EMAIL PROTECTED]> wrote: > Dear List > > I have two large matrices A and B. Both have the same dimensions, let's > say 20k x 30k. About half the cells of B are missing. Now I'm looking > for an efficient way to merge them, so that the missing values in B are > replaced by the corresponding values of A.
How about: B[is.na(B)] <- A[is.na(B)] Sarah -- Sarah Goslee http://www.stringpage.com ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
