Re: [R] Question to regular expressions

2008-12-02 Thread Antje
Thanks a lot again to all of you!!! Antje Antje schrieb: 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",

Re: [R] Question to regular expressions

2008-12-02 Thread Prof Brian Ripley
Antje wrote: Hi Gabor, it works! Thank you very much! But I still don't understand the difference between [0-9] and [:digit:]... If all else fails, read the help, here ?regex. Both [0-9] and [[:digit:]] are character classes of digits, but the first contains only arabic numerals. In some

Re: [R] Question to regular expressions

2008-12-02 Thread hadley wickham
On Tue, Dec 2, 2008 at 9:48 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:]... You might find this site helpful: http://regexp.resource.googlepages.com/analyzer.html Copy in your attempt

Re: [R] Question to regular expressions

2008-12-02 Thread Gabor Grothendieck
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: >> >>> fol

Re: [R] Question to regular expressions

2008-12-02 Thread Antje
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)

Re: [R] Question to regular expressions

2008-12-02 Thread Gabor Grothendieck
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 quest

[R] Question to regular expressions

2008-12-02 Thread Antje
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