[R] Fwd: as.POSIXlt() Function

[Vasantha Kumar Kesavan]

Hi,

I am a new R user and also not sure about the below concern is really a bug,

My concern are listed below,

Look at the below example, when Sys.Date () is called within the as.POSIXlt
() function. Why it is displaying only the date value and the timezone is
selected to UTC even though the TZ variable is set to "PST8PDT".  I could
not see this kind of behavior with as.POSIXct () function.

This is happening in both LINUX 32 and 64 bit operating system.


Example:

> version
               _
platform       i386-redhat-linux-gnu
arch           i386
os             linux-gnu
system         i386, linux-gnu
status
major          2
minor          10.0
year           2009
month          10
day            26
svn rev        50208
language       R
version.string R version 2.10.0 (2009-10-26)
> Sys.setenv(TZ="PST8PDT");
> Sys.setenv(ORA_SDTZ="PST8PDT");
>
> Sys.getenv("TZ");
       TZ
"PST8PDT"
> Sys.getenv("ORA_SDTZ");
 ORA_SDTZ
"PST8PDT"
>
> as.POSIXct(Sys.Date());
[1] "2014-10-20 17:00:00 PDT"
> c(as.POSIXct(Sys.Date()));
[1] "2014-10-20 17:00:00 PDT"
>
> as.POSIXlt(Sys.Date());
[1] "2014-10-21 UTC"
> c(as.POSIXlt(Sys.Date()));
[1] "2014-10-20 17:00:00 PDT"
>
> as.POSIXct(Sys.time());
[1] "2014-10-21 20:59:23 PDT"
> c(as.POSIXct(Sys.time()));
[1] "2014-10-21 20:59:23 PDT"
>
> as.POSIXlt(Sys.time());
[1] "2014-10-21 20:59:23 PDT"
> c(as.POSIXlt(Sys.time()));
[1] "2014-10-21 20:59:23 PDT"
>

Thanks
Vasanth

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