> > @Jorge # defining a function
is.installed <- function(mypkg) is.element(mypkg, installed.packages()[,1]) Thanks for that *Vincent Davis 720-301-3003 * vinc...@vincentdavis.net my blog <http://vincentdavis.net> | LinkedIn<http://www.linkedin.com/in/vincentdavis> On Sat, Apr 3, 2010 at 10:50 PM, Jorge Ivan Velez <jorgeivanve...@gmail.com>wrote: > Hi Vincent, > > Perhaps the following might work: > > # defining a function > is.installed <- function(mypkg) is.element(mypkg, installed.packages()[,1]) > > R> is.installed('MASS') > [1] TRUE > > R> is.installed('base') > [1] TRUE > > R> is.installed('ROCR') > [1] FALSE > > HTH, > Jorge > > > On Sun, Apr 4, 2010 at 12:40 AM, Vincent Davis <> wrote: > >> I am aware of .packages(all.available = TRUE) but I would like to just >> ask .packages('base') and get TRUE or even better check a list of packages >> and get a true/false list back. Is there a way to do this? >> >> *Vincent Davis >> 720-301-3003 * >> vinc...@vincentdavis.net >> my blog <http://vincentdavis.net> | >> LinkedIn<http://www.linkedin.com/in/vincentdavis> >> >> [[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. >> > > [[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.
