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:$]{6}", folders)
would match "F234562", "12345678", "234567", "912345"
Antje
Question to regular expressions
7 messages · Gabor Grothendieck, Antje, Hadley Wickham +1 more
Try this:
folders <- c("folder1", "f2", "F234562", "12345678", "234567", "912345", "333")
grep("^[0-9]{6}$", folders, value = TRUE)
[1] "234567" "912345"
On Tue, Dec 2, 2008 at 10:32 AM, Antje <niederlein-rstat at yahoo.de> 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:$]{6}", folders)
would match "F234562", "12345678", "234567", "912345"
Antje
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Hi Gabor, it works! Thank you very much! But I still don't understand the difference between [0-9] and [:digit:]... Ciao, Antje Gabor Grothendieck schrieb:
Try this:
folders <- c("folder1", "f2", "F234562", "12345678", "234567", "912345", "333")
grep("^[0-9]{6}$", folders, value = TRUE)
[1] "234567" "912345" On Tue, Dec 2, 2008 at 10:32 AM, Antje <niederlein-rstat at yahoo.de> 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:$]{6}", folders)
would match "F234562", "12345678", "234567", "912345"
Antje
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Try this:
"^[[:digit:]]{6}$"
On Tue, Dec 2, 2008 at 10:48 AM, Antje <niederlein-rstat at yahoo.de> 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}$", folders, value = TRUE)
[1] "234567" "912345" On Tue, Dec 2, 2008 at 10:32 AM, Antje <niederlein-rstat at yahoo.de> wrote:
Hi there,
I know, this question is not directly an R-help question but probably
someone can give me a hint how to deal with the following problem.
I have a vector with file/folder names and want to filter for all entries
which have 6 numbers in a row and nothing else.
folders <- c("folder1", "f2", "F234562", "12345678", "234567", "912345",
"333")
I'd like to get only "234567" and "912345".
Can anybody help me creating a regex for this???
For example this regex:
regexpr("[^:digit:$]{6}", folders)
would match "F234562", "12345678", "234567", "912345"
Antje
______________________________________________ R-help at 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.
On Tue, Dec 2, 2008 at 9:48 AM, Antje <niederlein-rstat at yahoo.de> 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 and Gabor's correction to see the difference more clearly. Hadley
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",
"912345", "333")
grep("^[0-9]{6}$", folders, value = TRUE)
[1] "234567" "912345" On Tue, Dec 2, 2008 at 10:32 AM, Antje <niederlein-rstat at yahoo.de> wrote:
Hi there,
I know, this question is not directly an R-help question but probably
someone can give me a hint how to deal with the following problem.
I have a vector with file/folder names and want to filter for all
entries
which have 6 numbers in a row and nothing else.
folders <- c("folder1", "f2", "F234562", "12345678", "234567", "912345",
"333")
I'd like to get only "234567" and "912345".
Can anybody help me creating a regex for this???
For example this regex:
regexpr("[^:digit:$]{6}", folders)
would match "F234562", "12345678", "234567", "912345"
Antje
______________________________________________ R-help at 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 at 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.
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 locales the second may contain other numerals (e.g. Japanese has other characters representing digits): however I believe that in the current R implementations that no other numerals are included in any locale.
Ciao, Antje Gabor Grothendieck schrieb:
Try this:
folders <- c("folder1", "f2", "F234562", "12345678", "234567",
"912345", "333")
grep("^[0-9]{6}$", folders, value = TRUE)
[1] "234567" "912345" On Tue, Dec 2, 2008 at 10:32 AM, Antje <niederlein-rstat at yahoo.de> wrote:
Hi there,
I know, this question is not directly an R-help question but probably
someone can give me a hint how to deal with the following problem.
I have a vector with file/folder names and want to filter for all
entries
which have 6 numbers in a row and nothing else.
folders <- c("folder1", "f2", "F234562", "12345678", "234567", "912345",
"333")
I'd like to get only "234567" and "912345".
Can anybody help me creating a regex for this???
For example this regex:
regexpr("[^:digit:$]{6}", folders)
would match "F234562", "12345678", "234567", "912345"
Antje
______________________________________________ R-help at 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 at 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.
Brian D. Ripley, ripley at stats.ox.ac.uk 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