Re: [R] show unique combination of two factor
Aimin Yan wrote: p factor have 5 levels aa factor have 19 levels. totally it should have 95 combinations. but I just find there are 92 combinations. Does anyone know how to code to find what combinations are missed? Here is an example with fewer factor levels of one way you might do this: df - data.frame(p = rep(c(A,B,C,D), each=10), aa = rep(c(Yes,No), 20)) df$aa - replace(df$aa, df$p == D, No) table(df) aa p No Yes A 5 5 B 5 5 C 5 5 D 10 0 names(which(with(df, table(interaction(p, aa))) == 0)) [1] D.Yes Thanks, Aimin __ R-help@stat.math.ethz.ch 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. -- Chuck Cleland, Ph.D. NDRI, Inc. 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894 __ R-help@stat.math.ethz.ch 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.
Re: [R] show unique combination of two factor
At 22:02 23/11/2006, Aimin Yan wrote: p factor have 5 levels aa factor have 19 levels. totally it should have 95 combinations. but I just find there are 92 combinations. Does anyone know how to code to find what combinations are missed? Does which(table(p,aa) == 0, arr.ind=TRUE) do what you wanted. Thanks, Aimin Michael Dewey http://www.aghmed.fsnet.co.uk __ R-help@stat.math.ethz.ch 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.
[R] show unique combination of two factor
p factor have 5 levels aa factor have 19 levels. totally it should have 95 combinations. but I just find there are 92 combinations. Does anyone know how to code to find what combinations are missed? Thanks, Aimin __ R-help@stat.math.ethz.ch 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.
