On 03-05-2013, at 17:24, jpm miao <miao...@gmail.com> wrote: > I have a program, when I write > > if(num!=NA) > > it yields an error message. >
it? What is unclear about the error message? > However, if I write > > if(is.na(num)==FALSE) > > it works. > > Why doesn't the first statement work? > Read section 2.5 'Missing values" of the manual "An Introduction to R". Berend > Thanks, > > Miao > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
