I am not exactly sure what you are asking for. I am assuming that you want a vector that represent the combinations that are given combinations that are present:
> N [1] 11 22 31 42 51 12 21 32 41 52 > table(i,j) j i 1 2 1 1 1 2 1 1 3 1 1 4 1 1 5 1 1 > z <- table(i,j) > which(z==1) [1] 1 2 3 4 5 6 7 8 9 10 > which(z==1,arr.ind=T) row col 1 1 1 2 2 1 3 3 1 4 4 1 5 5 1 1 1 2 2 2 2 3 3 2 4 4 2 5 5 2 > x <- which(z==1,arr.ind=T) > paste(rownames(z)[x[,'row']], colnames(z)[x[,'col']], sep='') [1] "11" "21" "31" "41" "51" "12" "22" "32" "42" "52" > On 8/1/07, G. Draisma <[EMAIL PROTECTED]> wrote: > Hallo, > > Im trying to find out how to tabulate frequencies > of factors when the data have a frequency variable. > > e,g: > i<-rep(1:5,2) > j<-rep(1:2,5) > N<-10*i+j > > table(i,j) gives a table of ones > as each combination occurs only once. > How does one get a table with the corresponding N's? > > Thanks! > Gerrit. > > > -- > Gerrit Draisma > Department of Public Health > Erasmus MC, University Medical Center Rotterdam > Room AE-103 > P.O. Box 2040 3000 CA Rotterdam The Netherlands > Phone: +31 10 4087124 Fax: +31 10 4638474 > http://mgzlx4.erasmusmc.nl/pwp/?gdraisma > > ______________________________________________ > 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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? ______________________________________________ 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.