I have a list ( in my real problem a double list y[[1:24]][[1:15]] but I think the solution would be the same)
m <- matrix(1:3, 3, 3) x <- list(m, m+3, m+6) and as I want to have the sum of elements I use Reduce(`+`, x) having as result > Reduce(`+`, x) [,1] [,2] [,3] [1,] 12 12 12 [2,] 15 15 15 [3,] 18 18 18 How can I take the sum of the list elements ignoring NA element For example if I have x[[1]][1]<-NA Then I want to have [,1] [,2] [,3] [1,] 11 12 12 [2,] 15 15 15 [3,] 18 18 18 instead of > Reduce(`+`, x) [,1] [,2] [,3] [1,] NA 12 12 [2,] 15 15 15 [3,] 18 18 18 Thanks in advance Evgenia -- View this message in context: http://r.789695.n4.nabble.com/Summing-list-with-NA-elements-tp4608167.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.