To run a cmd.exe built-in function use 'cmd /c function arg1 ...', as in
> status <- system("cmd /C echo foo")
foo
> status # 0 means all went well
[1] 0
as opposed to
> status <- system("echo foo")
> status
[1] 127
You get a little more information about that 127 return value
by adding intern=TRUE
> status <- system("echo foo", intern=TRUE)
Error in system("echo foo", intern = TRUE) : 'echo' not found
> status
[1] 127
See, e.g., http://ss64.com/nt/cmd.html for other arguments to cmd.exe.
Like Jeff said, unlink() is an OS-independent way to remove files
and directories so system("cmd /C del ...") is not terribly useful.
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
> -----Original Message-----
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
> Behalf Of Jeff Newmiller
> Sent: Saturday, October 08, 2011 11:20 AM
> To: syrvn; r-help@r-project.org
> Subject: Re: [R] Delete files with system command on Windows 7
>
> DEL is built in to CMD. Use the R "unlink" function.
> ---------------------------------------------------------------------------
> Jeff Newmiller The ..... ..... Go Live...
> DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go...
> Live: OO#.. Dead: OO#.. Playing
> Research Engineer (Solar/Batteries O.O#. #.O#. with
> /Software/Embedded Controllers) .OO#. .OO#. rocks...1k
> ---------------------------------------------------------------------------
> Sent from my phone. Please excuse my brevity.
>
> syrvn <ment...@gmx.net> wrote:
>
> It's all in the context of calling commands via the system command in R.
>
> I just found out that you can run system("pdflatex file") and it works fine.
> So R finds the command "pdflatex" but not the "del" command which I can use
> to delete files.
>
> I am wondering how I have to call this command to be able for R to find it.
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/Delete-files-with-system-command-on-
> Windows-7-tp3885478p3885554.html
> Sent from the R help mailing list archive at Nabble.com.
>
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