> The original post is ambiguous: do you want to find the intersection or do > you want to find whether a prespecified set is in the > intersection? Patrick > provided you an answer to the latter while you provided an answer to the > former. Actually, I thought using table as you did (mod the need for no > replicates) was clever. A more direct but I think considerably slower > approach would be to use intersect() in a loop: > > inall<-intersect(foo[[1]],foo[[,2]]) > for(i in seq(3, to=length(foo))inall<-intersect(inall,foo[[i]]) > > I suspect you already thought of this and rejected it. Other than > transparency, I think the only advantage it has is that it will work for > something other than lists of numerics, e.g. it will work for lists of > factors, which the table() solution would not.
Indeed, the first post was ambiguous. I was after the type of solution that I posted: the intersection rather than a prespecified set. Given that, I suppose my use of table is satisfactory. Thanks Patrick and Bert. -Andy ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
