I may or may not have the most elegant solution to this problem, but if it were me, I would probably put them all in a list and then
unique_matrix_list <- unique(list_of_matrix) # number of unique matricies: length(unique_matrix_list) # count the number of each matrix, for (m in unique_matrix_list) { count_m <- which(list_of_matrix == m) } but, i havent done this myself. see ?unique and maybe that'll help. -- View this message in context: http://r.789695.n4.nabble.com/Re-Counting-unique-items-in-a-list-of-matrices-tp2967112p2967151.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.