What timezones are you and your colleague in?
"2011-03-27 01:00:01" does not exist in some timezones, e.g.
Europe/London. As ?as.POSIXlt explains, you can expect such
non-existent inputs to give NA.
And from ?Sys.timezone:
Note that except on Windows, the operation of time zones is an OS
service, and even on Windows a third-party database is used and
can be updated (see the section on ‘Time zone names’). Incorrect
results will never be an R issue, so please ensure that you have
the courtesy not to blame R for them.
'R weird' was discourteous.
On 07/03/2012 00:46, Tiago Marques wrote:
Hello list,
I was hoping I could get some help on something which is really giving
me a headache. I am using R version 2.14.1 (2011-12-22)
(Platform: x86_64-pc-mingw32/x64 (64-bit))
An object which is supposed to have times has a few elements listed as
not times but NA's
> ls()
[1] "todelete"
> class(todelete)
[1] "POSIXlt" "POSIXt"
> todelete
[1] "2011-03-27 00:59:57" "2011-03-27 00:59:58" "2011-03-27 01:00:01"
"2011-03-27 01:00:02"
> is.na(todelete)
[1] FALSE FALSE TRUE TRUE
> as.numeric(todelete)
[1] 1301187597 1301187598 NA NA
but on another machine, from a colleague, over the same workspace,
returns this, as expected:
> ls()
[1] "todelete"
> class(todelete)
[1] "POSIXlt" "POSIXt"
> todelete
[1] "2011-03-27 00:59:57" "2011-03-27 00:59:58" "2011-03-27 01:00:01"
[4] "2011-03-27 01:00:02"
> is.na(todelete)
[1] FALSE FALSE FALSE FALSE
> as.numeric(todelete)
[1] 1301180397 1301180398 1301180401 1301180402
any suggestions about what might be going on here would be greatly
appreciated.
all the best
Tiago
--
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
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