[R] grep in filename

Charles C. Berry cberry at tajo.ucsd.edu
Thu Oct 4 20:36:09 CEST 2007

On Thu, 4 Oct 2007, Alberto Monteiro wrote:

> Is there any version of grep that gets information from the filename?
> For example:
> x <- "myfile.txt"
> y <- grep.file("my text", x)
> should return in y the lines with my text.
> I know that
> x <- "myfile.txt"
> y <- grep("my text", readLines(x))
> will probably work, but maybe there's a more direct (and
> less memory hungry) option.

Let your system utilities handle the burden.

For *NIXes, this approach:


and Windows XP



> Alberto Monteiro
> ______________________________________________
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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.

Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901

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