[R] regular expressions in R
jholtman at gmail.com
Wed Dec 21 17:22:56 CET 2011
To be correct for the regular expression, it should be:
dir(pattern = "\\.(txt|doc)$")
will match 'txt' appearing anywhere in the name; this looks like the
argument you would have used to "Sys.glob" which is a UNIX style file
name match and not a regular expression. "." matches any character
unless you escape it to mean a 'period'.
On Wed, Dec 21, 2011 at 11:11 AM, R. Michael Weylandt
<michael.weylandt at gmail.com> wrote:
> Do you wish to include .docx files as well or just .doc?
> On Wed, Dec 21, 2011 at 10:04 AM, Alaios <alaios at yahoo.com> wrote:
>> Dear all
>> I would like to ask from dir function in R (?dir)
>> to give me only the files that end with .txt or .doc.
>> The dir functions supports the use of patterns (is not that regular expressions) for doing that.
>> Could you please help me compose such a pattern?
>> [[alternative HTML version deleted]]
>> R-help at r-project.org mailing list
>> 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
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.
More information about the R-help