Bingo! See ?exists
G. On Tue, Mar 04, 2008 at 04:38:31PM +0100, Paul Hammer wrote: > hi members, > > give it a function for requesting if a object, matrix, vector, variable > or whatever already exists? > > e.g. if (*exists*(a) {print("yes") } else { print("no") } > > thanks > paul > > [[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. -- Csardi Gabor <[EMAIL PROTECTED]> UNIL DGM ______________________________________________ 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.