Check out your timezone. Did something change on that day?
You omitted the time, so it is trying to make sense of
"1982-01-01 00:00"
According to
http://en.wikipedia.org/wiki/Singapore_Standard_Time
that time did not exist in that time zone (which I am guessing is the
one your computer is set to. If I use TZ=Singapore I get
as.POSIXlt("1982-01-01")
Error in as.POSIXlt.character("1982-01-01") :
character string is not in a standard unambiguous format
as.POSIXlt("1982-01-01 00:00")
Error in as.POSIXlt.character("1982-01-01 00:00") :
character string is not in a standard unambiguous format
as.POSIXlt("1982-01-01 01:00")
[1] "1982-01-01 01:00:00 SGT"
x <- as.POSIXlt("1982-01-01 01:00")
x - 60*60 # an hour earlier
[1] "1981-12-31 23:30:00 SGT"
On Wed, 14 Jul 2010, Ian Seow wrote:
Oops, sorry! Here it is:
R version 2.11.1 (2010-05-31)
i386-pc-mingw32
locale:
[1] LC_COLLATE=English_Singapore.1252 LC_CTYPE=English_Singapore.1252
LC_MONETARY=English_Singapore.1252 LC_NUMERIC=C
[5] LC_TIME=English_Singapore.1252
attached base packages:
[1] grDevices datasets splines graphics stats tcltk utils
methods base
other attached packages:
[1] svSocket_0.9-48 TinnR_1.0.3 R2HTML_2.1 Hmisc_3.8-2
survival_2.35-8
loaded via a namespace (and not attached):
[1] cluster_1.12.3 grid_2.11.1 lattice_0.18-8 svMisc_0.9-57 tools_2.11.1
On Wed, Jul 14, 2010 at 10:24 AM, Erik Iverson <er...@ccbr.umn.edu> wrote:
Do you care to share your sessionInfo() , as the Posting Guide asks?
I cannot reproduce on:
R version 2.11.1 (2010-05-31)
i486-pc-linux-gnu
On 07/13/2010 09:07 PM, Ian Seow wrote:
Hi, I'm encountering a strange error in POSIXlt... anyone got a clue on
this?
as.POSIXlt("1982-01-01")
Error in as.POSIXlt.character("1982-01-01") :
character string is not in a standard unambiguous format
as.POSIXlt("1992-01-01")
[1] "1992-01-01"
as.POSIXlt("1972-01-01")
[1] "1972-01-01"
as.POSIXlt("1962-01-01")
[1] "1962-01-01"
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--
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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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
