This is what I get:
> unclass(strptime("1970-01-01", "%Y-%m-%d",
tz="GMT") + 0)
[1] 0
attr(,"tzone")
[1] "GMT"> unclass(strptime("1970-01-01", "%Y-%m-%d",
tz="EST5EDT") + 0)
[1] 18000
attr(,"tzone")
[1] "EST5EDT"> R.version.string # Windows Vista
[1] "R version 2.6.0 alpha (2007-09-06 r42791)"
so 1970-01-01 GMT is 0 and 1970-01-01 Eastern corresponds
to a GMT of 18000.
There is an article about dates and times in R News 4/1.
On 9/11/07, yoooooo <magno_yu at ml.com> wrote:>
> Hi all,
>
> I tried to do this:
>
> unclass(strptime("1970-01-01", "%Y-%m-%d",
tz="") + 0)
> [1] 18000
>
> I thought the starting time is zero? Same result returns if I do:
>
> unclass(strptime("1970-01-01", "%Y-%m-%d",
tz="EDT") + 0)
> unclass(strptime("1970-01-01", "%Y-%m-%d",
tz="EST") + 0)
> unclass(strptime("1970-01-01", "%Y-%m-%d",
tz="GMT") + 0)
>
> with LC_TIME=en_US;
>
> Or they always start from 18000?
>
> Thanks,
> - yoooooo
>
> --
> View this message in context:
http://www.nabble.com/as.POSIXlt%2C-starting-at-0-or-18000--tf4422770.html#a12615136
> Sent from the R help mailing list archive at Nabble.com.
>
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