A small test indicates that the following may be the fastest method (although all are pretty fast)
has.na <- !all(complete.cases(x)) Thanks Jim and Phil for your suggestions. /Ali On Wed, Oct 20, 2010 at 19:03, Jim Holtman <jholt...@gmail.com> wrote: > ?complete.cases > > Sent from my iPhone > > On Oct 20, 2010, at 18:53, Ali Tofigh <alix.tof...@gmail.com> wrote: > >> What is the best way to detect whether or not a (potentially large) >> matrix contains missing values (NAs) or not? I use >> >> if (sum(is.na(x)) > 0) {...} >> >> are there more efficient ways? >> >> /Ali >> >> ______________________________________________ >> 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.