Thanks for the solution . I especially liked the analogy along with the code
of course.
Regards,

Ajay

www.decisionstats.com

On Sat, Dec 6, 2008 at 1:23 AM, <Jagat.K.Sheth@wellsfargo.com> wrote:

> "This is almost a macro problem. It could be done in SAS language using
> the WPS product (660 USD) I think. ..."
>
> OUCH! Why do it the complicated way??? Check out ?dir, ?list.files, and
> then ?lapply for a simple start.
>
> Don't give up so soon! When it comes to R there is no need to punt - you
> can always keep possession of the ball ... :-)
>
> Cheers,
> Jagat
>
> -----Original Message-----
> From: r-help-bounces@r-project.org [mailto:r-help-bounces@r-project.org]
> On Behalf Of Ajay ohri
> Sent: Friday, December 05, 2008 12:59 PM
> To: Chris Poliquin
> Cc: r-help@r-project.org
> Subject: Re: [R] Running R Script on a Sequence of Files
>
> This is almost a macro problem. It could be done in SAS language using
> the
> WPS product (660 USD) I think.
> It is a familiar problem and I would be quite interested in the result.
>
> Is there any concept of Macros in R or a package to do the same.
>
> Regards,
>
> Ajay
>
> On Fri, Dec 5, 2008 at 11:31 PM, Chris Poliquin
> <poliquin@sas.upenn.edu>wrote:
>
> > 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?
> >
> > - Chris
> >
> > ______________________________________________
> > 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.
> >
>
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>
> ______________________________________________
> R-help@r-project.org mailing list
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>

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