Sys.glob is much more direct ....
Education of you might find exploring the power of?? (e.g. ??glob)
educational.
On Sun, 21 Dec 2008, Douglas Bates wrote:
On Sun, Dec 21, 2008 at 9:35 AM, Gundala Viswanath <gunda...@gmail.com> wrote:
Dear all,
For example I want to process set of files.
Typically Perl's idiom would be:
__BEGIN__
@files = glob("/mydir/*.txt");
foreach my $file (@files) {
# process the file
}
__END__
What's the R's way to do that?
One of them is exactly the same idiom.
The tools to do this are the functions list.files, grep (or variants
on grep) and perhaps glob2rx. See the help files for each.
One approach is
files <- list.files("~/Desktop")
txtfiles <- files[grep(glob2rx("*.txt"), files)]
txtfiles
[1] "notes312.txt" "stat324.txt"
Note that grep returns a vector of indices into the character vector,
not the character vectors themselves.
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--
Brian D. Ripley, rip...@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
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