both the following will probably do the trick. ?subset ?"["
Basically on the second one, you want to come down to something that looks like x[L] where x is a matrix/vector, and L is a logical vector that has the same dimension as x, but is TRUE on the values of x that you want to select. for instance x <- rnorm(100000) L <- x > 3 x[L] will return all values of x that are greater than 3. or you can just do x[x>3] On Sep 25, 9:45 am, "Jim Bouldin" <jrboul...@ucdavis.edu> wrote: > I realize this should be simple but I'm having trouble subsetting vectors > and matrices, for example extracting all values meeting a certain > criterion, from a vector. Cannot seem to figure out the correct syntax and > help page not very helpful. Or should I be using some other function than > subset. Thanks for any help. > > Jim Bouldin > > ______________________________________________ > r-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://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.
