try: 'x' %in% colnames(df)
hth, Kingsford On Mon, Jun 22, 2009 at 9:17 PM, R_help Help<rhelp...@gmail.com> wrote: > Hi, > > I have a matrix or data.frame (df). When I would like to check if a column > named "x" exists, it becomes my habit to do the following: > > if (length(which(colnames(df)=="x"))>0) > > Is there any smarter way to do this? Thank you. > > adschai > > [[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.
