Hi Joshua, Many thanks for your quick reply.
> You can do it by passing a matrix for indexing instead of two vectors. > Here's an example: > > tmpmat <- matrix(NA, nrow = 10, ncol = 10, > dimnames = list(letters[1:10], LETTERS[1:10])) > > tmpmat[cbind(c("d", "e", "f"), c("D", "E", "F"))] <- 100 > tmpmat > > The matrix is created using cbind() to columnwise bind the two vectors > together. Then it does what you want I think. > > Hope this helps, This looks interesting and is what I want, but I am not fully understanding the output I receive. The input array has 100 elements while the resulting vector after replacement is 106 elements long. I have tried to understand the manual on this, but it is yet not obvious for me how I am supposed to handle this output. All the best Øystein -- Dr. Oystein Godoy Norwegian Meteorological Institute P.O.BOX 43, Blindern, N-0313 OSLO, Norway Ph: (+47) 2296 3000 (switchb) 2296 3334 (direct line) Fax:(+47) 2296 3050 Institute home page: http://met.no/ ______________________________________________ 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.