Dear all, Need a help. I would like to count combination of two columns:
structure(list(V1 = structure(c(4L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L), .Label = c("23", "55", "67", "Env"), class = "factor"), V2 = structure(c(9L, 7L, 7L, 7L, 2L, 1L, 11L, 11L, 11L, 11L, 5L, 6L, 6L, 3L, 8L, 2L, 1L, 4L, 4L, 10L, 10L, 10L), .Label = c("Ck", "CK", "Dk", "IN", "jk", "NO", "NW", "PK", "place", "PR", "PT"), class = "factor")), .Names = c("V1", "V2"), class = "data.frame", row.names = c(NA, 22L)) For example: how many times 23 appear with NW and then I want to put the out put as a matrix NW Ck PT jK NO DK PK IN PR 23 3 55 67 Many thanks in advance Nico [[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.