Hello all,
I'm struggling with POSIXt objects. I've read the refman, the Rnews
from 2001 and hopefully all the pertinent help pages.
I'm running windows xp.
It appears my time zone variable isn't set, which hopefully is fine for this
exercise.> Sys.getenv("TZ")
TZ
""
help(as.POSIXct) states:
"Dates without times are treated as being at midnight UTC."
If I create a POSIXct without time, I get TZ:PDT (which is what my OS is set
at). Perhaps somebody could correct me, but I think this happens because the
default argument TZ="" means use local TZ.
> format(as.POSIXct("2011-09-25"),"%x %X %Z")
[1] "25/09/2011 12:00:00 AM PDT"
Based on those results would it be more accurate to say:
"Dates without times are treated as being at midnight of the specified
TZ." (i.e. if TZ="", then local TZ is used.)
thanks
Michael
_______________________________________________________
Michael Folkes
Salmon Stock Assessment
Canadian Dept. of Fisheries & Oceans
Pacific Biological Station
3190 Hammond Bay Rd.
Nanaimo, B.C., Canada
V9T-6N7
Ph (250) 756-7264 Fax (250) 756-7053 Michael.Folkes@dfo-mpo.gc.ca
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