outer(test, fac, "<") -b
On Jun 26, 2007, at 2:13 PM, Van Campenhout Bjorn wrote: > hi all, sorry for this basic question, I think I know I should use ? > apply, but it is really confusing me... > > I want to create a matrix by comparing two vectors. Eg: > > test<-seq(1:10) > fac<-c(3,6,9) > > and i want to end up with a 10*3 matrix with a boolean that tests > if test<fac, so something like: > > 1 1 1 > 1 1 1 > 0 1 1 > 0 1 1 > 0 1 1 > 0 0 1 > 0 0 1 > 0 0 1 > 0 0 0 > 0 0 0 > > I can't find the solution without using a loop... > > B > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. ______________________________________________ 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.