It's a place holder. See http://en.wikipedia.org/wiki/Foo
HTH KJ "Simon Tian" <simon...@gmail.com> wrote in message news:2119d1440908012150j373bfaf5v9d498bded94f...@mail.gmail.com... > Hi R users, > > I really want to know what exactly ".[foo]" means. > > Thanks in advance. -Simon > > [[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.
