Re: [R] wildcards and removing variables
On Mon, 2005-10-10 at 10:37 -0400, Afshartous, David wrote: All, Is there are a wildcard in R for varible names as in unix? For example, rm(results*) to remove all variable or function names that begin w/ results? cheers, Dave ps - please respond directly to [EMAIL PROTECTED] See ?ls, which has a 'pattern' argument, enabling the use of Regex to define the objects to be listed and subsequently removed using rm(). You can then use something like: rm(list = ls(pattern = \\bresults.)) HTH, Marc Schwartz __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] wildcards and removing variables
rm() can take a list of object names as an argument and ls(pattern='^results') gives such a list. So rm(ls(pattern='^results')) would remove all objects that are matched by the regular expression, that is all that begin with 'results' HTH, Johan 2005/10/10, Marc Schwartz (via MN) [EMAIL PROTECTED]: On Mon, 2005-10-10 at 10:37 -0400, Afshartous, David wrote: All, Is there are a wildcard in R for varible names as in unix? For example, rm(results*) to remove all variable or function names that begin w/ results? cheers, Dave ps - please respond directly to [EMAIL PROTECTED] See ?ls, which has a 'pattern' argument, enabling the use of Regex to define the objects to be listed and subsequently removed using rm(). You can then use something like: rm(list = ls(pattern = \\bresults.)) HTH, Marc Schwartz __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- Johan Sandblom N8, MRC, Karolinska sjh t +46851776108 17176 Stockholm m +46735521477 Sweden What is wanted is not the will to believe, but the will to find out, which is the exact opposite - Bertrand Russell __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] wildcards and removing variables
On 10/10/05, Marc Schwartz (via MN) [EMAIL PROTECTED] wrote: On Mon, 2005-10-10 at 10:37 -0400, Afshartous, David wrote: All, Is there are a wildcard in R for varible names as in unix? For example, rm(results*) to remove all variable or function names that begin w/ results? cheers, Dave ps - please respond directly to [EMAIL PROTECTED] See ?ls, which has a 'pattern' argument, enabling the use of Regex to define the objects to be listed and subsequently removed using rm(). You can then use something like: rm(list = ls(pattern = \\bresults.)) Also, in R 2.2.0 (or look in sfsmisc package for older versions of R) you can use glob2rx to get shell-style wildcards (aka globbing): ls(pattern = glob2rx(results*)) __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] wildcards and removing variables
On Mon, 10 Oct 2005, Marc Schwartz (via MN) wrote: On Mon, 2005-10-10 at 10:37 -0400, Afshartous, David wrote: All, Is there are a wildcard in R for varible names as in unix? For example, rm(results*) to remove all variable or function names that begin w/ results? cheers, Dave ps - please respond directly to [EMAIL PROTECTED] See ?ls, which has a 'pattern' argument, enabling the use of Regex to define the objects to be listed and subsequently removed using rm(). You can then use something like: rm(list = ls(pattern = \\bresults.)) One new feature of R-2.2.0 is glob2rx, which converts wildcards to regexps for you. E.g. rm(list = ls(pattern = glob2rc(results*))) (I think if does it a little better, as that trailing dot is not I think correct: result* matches result.) -- 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, UKFax: +44 1865 272595 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] wildcards and removing variables
In R 2.2.0, there is the function 'glob2rx()' which can be used for this purpose. As in rm(list = ls(pattern = glob2rx(results*))) -roger Afshartous, David wrote: All, Is there are a wildcard in R for varible names as in unix? For example, rm(results*) to remove all variable or function names that begin w/ results? cheers, Dave ps - please respond directly to [EMAIL PROTECTED] [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- Roger D. Peng http://www.biostat.jhsph.edu/~rpeng/ __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] wildcards and removing variables
On Mon, 2005-10-10 at 16:01 +0100, Prof Brian Ripley wrote: On Mon, 10 Oct 2005, Marc Schwartz (via MN) wrote: On Mon, 2005-10-10 at 10:37 -0400, Afshartous, David wrote: All, Is there are a wildcard in R for varible names as in unix? For example, rm(results*) to remove all variable or function names that begin w/ results? cheers, Dave ps - please respond directly to [EMAIL PROTECTED] See ?ls, which has a 'pattern' argument, enabling the use of Regex to define the objects to be listed and subsequently removed using rm(). You can then use something like: rm(list = ls(pattern = \\bresults.)) One new feature of R-2.2.0 is glob2rx, which converts wildcards to regexps for you. E.g. rm(list = ls(pattern = glob2rc(results*))) (I think if does it a little better, as that trailing dot is not I think correct: result* matches result.) Thanks to both Gabor and Prof. Ripley for pointing out the use of glob2rc(). One of the new features I had forgotten about since reading NEWS. On the trailing dot, I was just in the process of drafting a follow up after realizing my error, since as you point out, 'results' would not be matched in that case. Thanks, Marc __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
