Thank you Jim, Sorry, that I was not clear enough. Each case has a frequency variable N. so when tabulating combinations (i,j) they should be weighted with weight N.
In this case I would like a command table(i,j,N) resulting in j i 1 2 1 11 12 2 21 22 ... 5 51 52 And I was looking for a table command that allows for a case weight variable. Gerrit. on 01-Aug-2007 22:38 jim holtman said the following: > 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. >> > > -- 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.