How about this: t2 <- table(c(10,11,12,13)) t1 <-table(c(1,1,2,4,5)) t12<-(rbind(as.data.frame(t1),as.data.frame(t2))) xtabs(Freq~.,t12)
it works for "overlapping" tables t2 <- table(c(10,11,12,13,1,2)) t1 <-table(c(1,1,2,4,5,11,12)) t12<-(rbind(as.data.frame(t1),as.data.frame(t2))) xtabs(Freq~.,t12) and it will work for two-dimensional tables as well: t2 <- table(c(10,11,12,13),letters[rep(1:2,each=2)]) t1 <-table(c(1,1,2,4,5),letters[rep(c(1,3),length.out=5)]) t12a<-(rbind(as.data.frame(t1),as.data.frame(t2))) xtabs(Freq~.,t12a) cheers. Am 10.12.2013 00:59, schrieb Ross Boylan: > Can anyone recommend a good way to add tables? > Ideally I would like > t1 <- table(x1) > t2 <- table(x2) > t1+t2 > > It t1 and t2 have the same levels this works fine, but I need something > that will work even if they differ, e.g., > > t1 > > 1 2 4 5 > 2 1 1 1 > > t2 <- table(c(10, 11, 12, 13)) > > t1+t2 # apparently does simple vector addition > > 1 2 4 5 > 3 2 2 2 > whereas I want > 1 2 4 5 10 11 12 13 > 2 1 1 1 1 1 1 1 > > ______________________________________________ > 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. > -- Eik Vettorazzi Department of Medical Biometry and Epidemiology University Medical Center Hamburg-Eppendorf Martinistr. 52 20246 Hamburg T ++49/40/7410-58243 F ++49/40/7410-57790 -- Besuchen Sie uns auf: www.uke.de _____________________________________________________________________ Universitätsklinikum Hamburg-Eppendorf; Körperschaft des öffentlichen Rechts; Gerichtsstand: Hamburg Vorstandsmitglieder: Prof. Dr. Christian Gerloff (Vertreter des Vorsitzenden), Prof. Dr. Dr. Uwe Koch-Gromus, Joachim Prölß, Rainer Schoppik _____________________________________________________________________ SAVE PAPER - THINK BEFORE PRINTING ______________________________________________ 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.
