In the absence of any of the information requested in the posting guide,
all we can say is that this works for other people (e.g. on both Mac OS X
and Fedora 8 for me).
Apart from the usual info, we would need to know your timezone.
On Tue, 9 Dec 2008, eric lee wrote:
Hi. I'm trying to take the difference in days between two times. Can
you point out what's wrong, or suggest a different function? When I
try the following code, The following code works fine:
a <- strptime(1911100807,format="%Y%m%d%H",tz="GMT")
b <- strptime(1911102718,format="%Y%m%d%H",tz="GMT")
x <- difftime(b, a, units="days")
x
But when I change the year, the following code returns 'NA' for the
time between a and b. Thanks.
a <- strptime(1999100807,format="%Y%m%d%H",tz="GMT")
b <- strptime(1999102718,format="%Y%m%d%H",tz="GMT")
x <- difftime(b, a, units="days")
x
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PLEASE do.
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
