On 26/10/2008 11:54 AM, John Lande wrote:
dear all,
I have a little problem I am doing a loop, witha grep function. sometimes it
happens that have the following results
tmp <- grep("x", y)
tmp
integer(0)
how can I recognise this outcome? is.na is not working of course, so what
else?
length(integer(0)) is zero. If you get any matches, you'll get a longer
result.
Duncan Murdoch
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
