Here are two (pretty much the same) ways: > d x1 x2 x3 1 D D A 2 B D A 3 C A <NA> 4 D D A 5 A D C > table(sapply(d, as.character))
A B C D 5 1 2 6 > table(as.matrix(d)) A B C D 5 1 2 6 > sum(is.na(d)) [1] 1 HTH, Andy > From: Jan Sabee > > Dear all R member, > > I have a dataset which looks like: > > x1 x2 . . . x250 > A A C > A C C > A A A > A A <NA> > B B B > <NA> C B > ... > more 2000 rows. > > I need count all dataset at the following: > > A = sum of A > B = sum of B > C = sum of C > <NA> = sum of <NA> > > What function can I use? > I'm just a beginner in R programming. > > Best regards, > Jan Sabee > > ______________________________________________ > 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 > > > ______________________________________________ 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