Another way is: > subset(df, select=c(var.b, var.c))
though I'd be willing to bet that using %in% is probably faster.[1] Tony [1] Unfortuantly I'm skint :-( On 24 Feb, 20:10, Sean Zhang <seane...@gmail.com> wrote: > Dear R-helpers: > > I am an R novice and would appreciate answer to the following question. > > Want to delete many variables in a dataframe. > Am able to delete one variable by assigning it as NULL > Have a large number of variables and would like to delete them without using > a for loop. > > Is there a command/function which does this job? > > Many thanks in advance. > > -Sean > > #Small Example: > > df<-data.frame(var.a=rnorm(10), var.b=rnorm(10),var.c=rnorm(10)) > df[,'var.a']<-NULL #this works for one single variable > df[,c('var.a','var.b')]<-NULL #does not work for multiple variables > > [[alternative HTML version deleted]] > > ______________________________________________ > r-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://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.