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, <[EMAIL PROTECTED]> 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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > 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 > <[EMAIL PROTECTED]>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. > > > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > > [[alternative HTML version deleted]] ______________________________________________ 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.
