I'll appreciate your help on this. I have values stored in a list as in "mylist" below. I need to sum the values over all elements of the list aggregated by the names of the matrices. mylist <- list(matrix(c(0.2, 0.4), 1, 2, dimnames = list(NULL, c("1", "2"))), matrix(c(0.1, 0.5), 1, 2, dimnames = list(NULL, c("1", "3"))), matrix(c(0.3, 0.7), 1, 2, dimnames = list(NULL, c("2", "5")))) In this example, I'd like to get a single matix with the following values:
varname value 1 0.3 (i.e., 0.2 + 0.1) 2 0.7 (i.e., 0.4 + 0.3) 3 0.5 (i.e., 0.5) 5 0.7 (i.e., 0.7) Any help is much appreciated. Regards, Axel. [[alternative HTML version deleted]] ______________________________________________ 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.