If you had updated your R before posting (as the posting guide suggested) you would have found such an option under ?options. It was new in R 2.6.0.
On Tue, 30 Oct 2007, P. Olsson wrote: > Dear R-users, > > currently I am working with the R version 2.4.1. > I realized it has a feature, which might be wonderful (as so many things in > R), but in this case might be a bit dangerous as well. It seems that columns > of a data frame can be called just by indicating the first letter of the > name of the column. Well, this applies to lists not just data frame, and to partial matching not just the first letter. If you want only exact matches I suggest you use other operators, e.g. dat[["f"]] will warn in 2.6.x and fail in R-devel. > For example: > first_item <- seq(1,10) > second_item <- seq(11,20) > dat <- data.frame(first_item, second_item) > names(dat) > # [1] "first_item" "second_item" > dat$f > # [1] 1 2 3 4 5 6 7 8 9 10 > dat$s > # [1] 11 12 13 14 15 16 17 18 19 20 > > The good thing is, that if there is more than one column starting with the > same letter(s), more than one letter has to be given to call the column. > However, I would appreciate if I could choose an option in my workspace, > whether this type of shortcut is allowed or not. > > Is there such an option? > > Thanks for any potential hints. > > Best wishes, > > P. Olsson > > [[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. Please do. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ 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.
