[R] Pipe /shell - R does not wait
murdoch at stats.uwo.ca
Mon Feb 1 12:38:02 CET 2010
robbert blonk wrote:
> Dear All,
> Within a large script, I try to invoke a second program (called e.g. XXX)
> from R using "shell" or "pipe".
>> shell("XXX",intern=TRUE, wait = TRUE)
> After running the program, the script reads a file with solutions produced
> by the second program ("XXX.001").
> This works fine, when the second program finishes quickly. However, when it
> takes some more time (like 2 minutes) R does not wait and starts looking for
> XXX.001 which is not there (yet). Consequently,my beautiful script
> Is there a way to let R wait until the second program really finishes?? the
> argument "wait = TRUE" obviously doesn't work...
You need to give some details, like R version, platform, etc.
If you're on Windows, you might want to try a recent R-devel build:
I've recently made some improvements to the system/shell/pipe code.
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