On Dec 28, 2011, at 5:57 PM, Ben quant wrote:
One quick follow-up on reversing your example. Is there an easy way
to get
the file.path separator for the platform? file.path("","") seems
the be
the only way to do it.
I don't get it. Did you look at ?file.path ? It's default call shows
fsep=
> .Platform$file.sep
[1] "/"
?.Platform
--
David.
So if filename is a valid file path, this will return the folders,
drive,
and file name in vector form regardless of the platform:
folders = strsplit(normalizePath(filename, winslash="/"), "/")[[1]]
This will undo the above regardless of the platform:
paste(folders,collapse=file.path('"",""))
Thanks again for your help Duncan!
Ben
On Wed, Dec 28, 2011 at 2:37 PM, Duncan Murdoch <murdoch.dun...@gmail.com
>wrote:
On 11-12-28 4:30 PM, Ben quant wrote:
Hello, (sorry re-posting due to typo)
I'm attempting to get the folders of a path in a robust way
(platform
independent, format independent). It has to run on Windows and
Linux and
tolerate different formats.
For these: (The paths don't actually exist in Linux but you get the
idea.)
Windows:
file_full_path = "C://Program Files//R//R-2.13.1//NEWS.pdf"
file_full_path = "C:\Program Files\R\R-2.13.1\NEWS.pdf"
Linux:
file_full_path = "~/Program FilesR/R-2.13.1/NEWS.pdf"
file_full_path = "/home/username/Program FilesR/R-2.13.1/NEWS.pdf"
I would get for Windows: "C", "Program Files", "R",
"R-2.13.1","NEWS.pdf"
I would get for Linux: "home","username", "Program Files", "R",
"R-2.13.1","NEWS.pdf"
(The drive and/or home/username aren't necessary, but would be
nice to
have. Also, that file name isn't necessary, but would be nice.)
Thank you for your help,
If you use the normalizePath() function with winslash="/", then all
current platforms will return a path using "/" as the separator,
so you
could do something like
strsplit(normalizePath(**filename, winslash="/"), "/")[[1]]
You need to be careful with normalizePath: at least on Windows,
it will
not necessarily do what you wanted if the filename doesn't exist.
Duncan Murdoch
[[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.
David Winsemius, MD
West Hartford, CT
______________________________________________
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.
