Globbing Files in R
On Sun, Dec 21, 2008 at 9:35 AM, Gundala Viswanath <gundalav at 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?
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.