JIA Pei
2011-Jul-19 22:45 UTC
[R] list.files recursively to find files in a specific way...
Hi, all: My folders are organized in such a way: root ----branch1 ---------------A -----------------------file1.txt -----------------------file2.txt ---------------B -----------------------file1.txt -----------------------file2.txt ----branch2 ---------------A -----------------------file1.txt -----------------------file2.txt ---------------B -----------------------file1.txt -----------------------file2.txt ... ----branch100 ---------------A -----------------------file1.txt -----------------------file2.txt ---------------B -----------------------file1.txt -----------------------file2.txt I'd love to list all file2.txt from all subdirectories "B"s but not from "A"s, how to do that? I tried the following two a) allResults <- list.files(path = routeStr, pattern = "file2.txt", all.files = TRUE, full.names = TRUE, recursive = TRUE); gives me 200 files in allResults, which is wrong. There should be only 100 files in allResults. b) allResults <- list.files(path = routeStr, pattern = "B/file2.txt", all.files = TRUE, full.names = TRUE, recursive = TRUE); still wrong. It give me nothing, namely, 0 file(s) in allResults. Can anybody help to solve this problem? Best Regards Pei -- Pei JIA Email: jp4work@gmail.com cell: +1 604-362-5816 Welcome to Vision Open http://www.visionopen.com [[alternative HTML version deleted]]
Phil Spector
2011-Jul-19 22:56 UTC
[R] list.files recursively to find files in a specific way...
Pei -
A file pattern can't contain a directory separator, but it's
easy to search for one outside the context of list.files. I think
grep('B/file2.txt',list.files(path = routeStr, all.files = TRUE,
full.names = TRUE, recursive = TRUE),value=TRUE)
should give you what you want.
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spector at stat.berkeley.edu
On Tue, 19 Jul 2011, JIA Pei wrote:
> Hi, all:
>
> My folders are organized in such a way:
>
>
> root
>
> ----branch1
> ---------------A
> -----------------------file1.txt
> -----------------------file2.txt
> ---------------B
> -----------------------file1.txt
> -----------------------file2.txt
>
> ----branch2
> ---------------A
> -----------------------file1.txt
> -----------------------file2.txt
> ---------------B
> -----------------------file1.txt
> -----------------------file2.txt
>
> ...
>
> ----branch100
> ---------------A
> -----------------------file1.txt
> -----------------------file2.txt
> ---------------B
> -----------------------file1.txt
> -----------------------file2.txt
>
>
>
> I'd love to list all file2.txt from all subdirectories "B"s
but not from
> "A"s, how to do that?
>
> I tried the following two
>
> a) allResults <- list.files(path = routeStr, pattern =
"file2.txt",
> all.files = TRUE, full.names = TRUE, recursive = TRUE);
> gives me 200 files in allResults, which is wrong. There should be only 100
> files in allResults.
>
> b) allResults <- list.files(path = routeStr, pattern =
"B/file2.txt",
> all.files = TRUE, full.names = TRUE, recursive = TRUE);
> still wrong. It give me nothing, namely, 0 file(s) in allResults.
>
>
> Can anybody help to solve this problem?
>
>
> Best Regards
> Pei
>
>
>
>
>
>
>
>
>
>
>
> --
>
> Pei JIA
>
> Email: jp4work at gmail.com
> cell: +1 604-362-5816
>
> Welcome to Vision Open
> http://www.visionopen.com
>
> [[alternative HTML version deleted]]
>
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