Thank you -- I missed the bit about the invisible attribute.
Can this happen with pipe, as well?
x = readLines(pipe("perl -e 'print \"foo\\\n\";exit(-1);'"))
x
[1] "foo"
I'd want to know that the command failed so I can process x differently.
Thanks again,
Ranjan Bagchi
On Wed, 30 Jul 2008, Prof Brian Ripley wrote:
On Wed, 30 Jul 2008, Ranjan Bagchi wrote:
Hi --
Is there a way of detecting the exit code while calling system or pipe?
Yes, see the help page (you are ignoring the return value).
print(system("perl -e 'print \"foo\\\n\";exit(-1);'"))
foo
[1] 65280
(= 256*255)
eg (on Unix)
system("perl -e 'print \"foo\\\n\";exit(-1);'")
foo
Any help appreciated,
Ranjan
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--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
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