[R] Question to regular expressions
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:$]{6}, folders)
would match F234562, 12345678, 234567, 912345
Antje
__
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Re: [R] Question to regular expressions
Try this:
folders - c(folder1, f2, F234562, 12345678, 234567, 912345,
333)
grep(^[0-9]{6}$, 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:$]{6}, folders)
would match F234562, 12345678, 234567, 912345
Antje
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Question to regular expressions
Hi Gabor,
it works! Thank you very much! But I still don't understand the difference
between [0-9] and [:digit:]...
Ciao,
Antje
Gabor Grothendieck schrieb:
Try this:
folders - c(folder1, f2, F234562, 12345678, 234567, 912345, 333)
grep(^[0-9]{6}$, 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:$]{6}, folders)
would match F234562, 12345678, 234567, 912345
Antje
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Question to regular expressions
Try this:
^[[:digit:]]{6}$
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.
Re: [R] Question to regular expressions
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 and Gabor's correction to see the difference more clearly. Hadley -- http://had.co.nz/ __ 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.
Re: [R] Question to regular expressions
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}$, folders, value = TRUE)
[1] 234567 912345
On Tue, Dec 2, 2008 at 10:32 AM, Antje [EMAIL PROTECTED] wrote:
Hi there,
I know, this question is not directly an R-help question but probably
someone can give me a hint how to deal with the following problem.
I have a vector with file/folder names and want to filter for all
entries
which have 6 numbers in a row and nothing else.
folders - c(folder1, f2, F234562, 12345678, 234567, 912345,
333)
I'd like to get only 234567 and 912345.
Can anybody help me creating a regex for this???
For example this regex:
regexpr([^:digit:$]{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.
--
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@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.
Re: [R] Question to regular expressions
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}$, folders, value = TRUE)
[1] 234567 912345
On Tue, Dec 2, 2008 at 10:32 AM, Antje [EMAIL PROTECTED] wrote:
Hi there,
I know, this question is not directly an R-help question but probably
someone can give me a hint how to deal with the following problem.
I have a vector with file/folder names and want to filter for all
entries
which have 6 numbers in a row and nothing else.
folders - c(folder1, f2, F234562, 12345678, 234567, 912345,
333)
I'd like to get only 234567 and 912345.
Can anybody help me creating a regex for this???
For example this regex:
regexpr([^:digit:$]{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.
__
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.
