On Oct 8, 2010, at 3:43 PM, rivercode wrote:
Losing time offset from GMT:
sTime = as.POSIXct(paste("2008-03-03","09:30:01"),
origin="1970-01-01")
sTime
[1] "2008-03-03 09:30:01 EST" <---- 9.31am EST
sTime
[1] 1204554601
t = as.numeric(sTime)
as.POSIXct(t, origin="1970-01-01")
[1] "2008-03-03 14:30:01 EST" <----- no tz option and t is sTime +
5 hours
ahead (assume because I am in EST)
as.numeric(as.POSIXct(t, origin="1970-01-01"))
[1] 1204572601 <----- value of t is sTime +5 hours
as.POSIXct(t, origin="1970-01-01", tz="GMT")
[1] "2008-03-03 14:30:01 GMT" <--- time has not changed even
though I used
tz=”GMT”
as.numeric(as.POSIXct(t, origin="1970-01-01", tz="GMT"))
[1] 1204554601 <----- value is still sTime +5 hours though I am
using GMT
No, ... it's not.
> 1204572601-1204554601 == 60*60*5
[1] TRUE ----> 5 hours difference and also == sTime
I am in New York so am on EST time.
Missing the obvious...but what is it ?
Thanks,
Chris
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