If d is your dataframe, how about ind <- d$Dist == 2 aggregate(d,by=list(d$NameA,dNameA),FUN=length)
Regards, Moshe. --- Karin Lagesen <[EMAIL PROTECTED]> wrote: > > I have a data frame with data similar to this: > > NameA GrpA NameB GrpB Dist > A Alpha B Alpha 0.2 > A Alpha C Beta 0.2 > A Alpha D Beta 0.4 > B Alpha C Beta 0.2 > B Alpha D Beta 0.1 > C Beta D Beta 0.3 > > Dist is a distance measure between two entities. The > table displays > all to all distances, but the distance between two > entities only > appears once. What I would like to get is a table > where I get a count > of entities per group where the distance satisfies a > certain condition > ( equal to zero for instance). > > In this case, if the requirement was Distances == > 0.2 > > Alpha Beta > Alpha 1 2 > Beta 2 0 > > This resulting table would be symmetrical. > > I hope I am able to convey what I would like, and > TIA for your help! > > Karin > -- > Karin Lagesen, PhD student > [EMAIL PROTECTED] > http://folk.uio.no/karinlag > > ______________________________________________ > 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.
