[R] Running R Script on a Sequence of Files

[Gabor Grothendieck]

Try this:

dir()[!file.info(dir())$isdir]


On Fri, Dec 5, 2008 at 2:30 PM, Gustavo Carvalho
<gustavo.bio+R at gmail.com> wrote:
> Is there a way to list only the files in a given directory without
> passing pattern="..." to list.files()?
>
> On Fri, Dec 5, 2008 at 5:10 PM, Kyle. <ambertk at gmail.com> wrote:
>> Thanks, Barry. I'll use that in the future.
>>
>>
>> ---Kyle.
>>
>> On Fri, Dec 5, 2008 at 11:01 AM, Barry Rowlingson <
>> b.rowlingson at lancaster.ac.uk> wrote:
>>
>>> 2008/12/5 Chris Poliquin <poliquin at sas.upenn.edu>:
>>> > Hi,
>>> >
>>> > I have about 900 files that I need to run the same R script on.  I looked
>>> > over the R Data Import/Export Manual and  couldn't come up with a way to
>>> > read in a sequence of files.
>>> >
>>> > The files all have unique names and are in the same directory.  What I
>>> want
>>> > to do is:
>>> > 1) Create a list of the file names in the directory (this is really what
>>> I
>>> > need help with)
>>> > 2) For each item in the list...
>>> >        a) open the file with read.table
>>> >        b) perform some analysis
>>> >        c) append some results to an array or save them to another file
>>> > 3) Next File
>>> >
>>> > My initial instinct is to use Python to rename all the files with numbers
>>> > 1:900 and then read them all, but the file names contain some information
>>> > that I would like to keep intact and having to keep a separate database
>>> of
>>> > original names and numbers seems inefficient.  Is there a way to have R
>>> read
>>> > all the files in a directory one at a time?
>>>
>>>  I can't believe the two 'solutions' already posted. It's easy:
>>>
>>>  ?list.files
>>>
>>> Barry
>>>
>>> ______________________________________________
>>> 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.
>>>
>>
>>        [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> 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.
>