Hello, This is a seemingly simple task, but it has been frustrating me for too long, so I am turning to this list for some help.
I have two vectors of factors which are quite long; two simple examples are shown here: > a <- c(1,2,3,4,5) > b <- c(1,2,5,5,6) If I produce a cross-tabulation of these vectors, I get the following: > tab <- table(a,b) > table(a,b) b a 1 2 5 6 1 1 0 0 0 2 0 1 0 0 3 0 0 1 0 4 0 0 1 0 5 0 0 0 1 I really want to have this cross-tabulation expanded to include all factors present in the input data. Thus, I need additional columns for categories 3 and 4, and a row for category 6, albeit, they will be filled with zeros. Is there an easy way of doing this? Thanks, Tarmo ____________________________________________ Tarmo K. Remmel Ph.D. Assistant Professor, Department of Geography York University, N413A Ross Building Toronto, Ontario, M3J 1P3, Canada Tel: 416-736-2100 x22496; Fax: 416-736-5988 http://www.yorku.ca/remmelt Skype: tarmoremmel ______________________________________________ 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.
