[R] Testing for the existence of a file.
rolf at maths.uwa.edu.au
Fri Nov 2 05:27:27 CET 2001
Is there any way to do this (test for the existence of a file)
in R? In Splus (3.4) I can do
unix(paste("test -r", fnm), output = F)
where ``fnm'' is a character string giving the pathname of the file.
This returns 0 if the file exists and 256 if it doesn't.
I thought in R to do something like
system(paste("test -r", fnm), intern =T)
but this returns ``character(0)'' irrespective of the existence of
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