On 08-03-2012, at 12:15, Jon Olav Skoien wrote:
> Hi,
>
> One of the functions I use needs to write to a temporary file, in the
> directory given by tempdir(). I want to change this from the standard one, as
> the file is too large for the drive. However, tempfile() doesnt seem to
> respect the environment variables when I change them with Sys.setenv(). In a
> fresh R-session:
>
> > Sys.getenv("TMP")
> [1] "C:\\Users\\skoiejo\\AppData\\Local\\Temp"
> > Sys.setenv(TMP = "e:\\Temp\\Rtmp")
> > Sys.getenv("TMP")
> [1] "e:\\Temp\\Rtmp"
> > tempfile()
> [1] "C:\\Users\\skoiejo\\AppData\\Local\\Temp\\Rtmp2tvQ7U\\file499a5987"
> # I have also tried to change "TMPDIR", "TEMP" and "R_USER", all with the
> same result.
>
> # The directory is writable:
> > write("some text", file = paste(Sys.getenv("TMP"),"test.txt",sep = ""))
> > list.files(Sys.getenv("TMP"))
> [1] "test.txt"
>
> I have probably misunderstood something, but what? Session info below.
>From the help for Sys.setenv:
Sys.setenv sets environment variables (for other processes called from within R
or future calls to Sys.getenv from this R process).
You should try
tempfile(tmpdir=Sys.getenv("TMP"))
and see if that works.
Berend
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