On Tue, 8 Feb 2011, Manuel Gimond wrote:
Converting date strings that range between Mar-14-2010 2:00 and
Mar-14-2010 2:59 (inclusive) to date objects (POSIX) returns a NA entity:
> strptime("3/14/2010 2:00",format="%m/%d/%Y %H:%M")
[1] "2010-03-14 02:00:00"
This looks fine, however other functions such as plot see a NA object
instead:
> is.na(strptime("3/14/2010 2:00",format="%m/%d/%Y %H:%M"))
[1] TRUE
I've processed an entire range of dates for 2010 and have only come
across this problem for the aforementioned date ranges. For instance,
the following dates work fine:
> is.na(strptime("3/14/2010 3:00",format="%m/%d/%Y %H:%M"))
[1] FALSE
> is.na(strptime("10/14/2010 23:00",format="%m/%d/%Y %H:%M"))
[1] FALSE
which is what I would expect for ALL dates.
Could this be a bug with POSIX or strptime? I'm running R x64 2.12.0 on Win7
You haven't told us your timezone, but very likely you are in one
where that hour did not actually exist (as DST came into effect).
[[alternative HTML version deleted]]
And you definitely overlooked the request in the posting guide not to
send HTML.
______________________________________________
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.
--
Brian D. Ripley, rip...@stats.ox.ac.uk
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
______________________________________________
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.
