Try this: "^[[:digit:]]{6}$"
On Tue, Dec 2, 2008 at 10:48 AM, Antje <[EMAIL PROTECTED]> wrote: > Hi Gabor, > > it works! Thank you very much! But I still don't understand the difference > between [0-9] and [:digit:]... > > Ciao, > Antje > > > Gabor Grothendieck schrieb: >> >> Try this: >> >>> folders <- c("folder1", "f2", "F234562", "12345678", "234567", "912345", >>> "333") >>> grep("^[0-9]{6}$", folders, value = TRUE) >> >> [1] "234567" "912345" >> >> >> On Tue, Dec 2, 2008 at 10:32 AM, Antje <[EMAIL PROTECTED]> wrote: >>> >>> Hi there, >>> >>> I know, this question is not directly an R-help question but probably >>> someone can give me a hint how to deal with the following problem. >>> >>> I have a vector with file/folder names and want to filter for all entries >>> which have 6 numbers in a row and nothing else. >>> >>> folders <- c("folder1", "f2", "F234562", "12345678", "234567", "912345", >>> "333") >>> >>> I'd like to get only "234567" and "912345". >>> Can anybody help me creating a regex for this??? >>> >>> For example this regex: >>> >>> regexpr("[^:digit:$]{6}", folders) >>> >>> would match "F234562", "12345678", "234567", "912345" >>> >>> >>> Antje >>> >>> ______________________________________________ >>> 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.