Hello, Something like this should work:
table(test$V1[!test$V2 %in% c("NM","QC")]) Cheers, Gustavo. On Wed, Dec 24, 2008 at 3:06 AM, Gundala Viswanath <gunda...@gmail.com> wrote: > Dear all, > > I have the following data frame: > > V1 V2 > aaa chr1 > aaa chr2 > aaa NM > aaa QC > aaa chr10 > att NM > att chr7 > > What I want to do is to count the string (V1). > But the condition of counting is: if the V2 of the string > is "NM" or "QC" then the count is not increased. > > Hence the contigency table will look like this: > > #tag count > aaa 3 > att 1 > > Is there a compact way to achieve that in R? > I am thinking of using "table" but can't see > how to impose such condition into it. > > > - Gundala Viswanath > Jakarta - Indonesia > > ______________________________________________ > 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. > ______________________________________________ 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.