[R] bug in difftime with as.POSIXct

Gabor Grothendieck ggrothendieck at gmail.com
Sun Jan 27 20:33:20 CET 2008


Read relevant article in R News 4/1.

On Jan 27, 2008 2:20 PM, Dan Kelley <Dan.Kelley at dal.ca> wrote:
>
> Oh, I'm sorry to be posting a reply to my own stupid question, but the
> problem is that I had not specified GMT, and so it was using local time,
> which changes to 'save daylight".  This is demonstrated below:
>
> > unclass(as.POSIXct("1975-04-27",tz="GMT"))[1]-unclass(as.POSIXct("1975-04-28",tz="GMT"))[1]
> [1] -86400
> > unclass(as.POSIXct("1975-04-27"))[1]-unclass(as.POSIXct("1975-04-28"))[1]
> [1] -82800
>
> --
> View this message in context: http://www.nabble.com/bug-in-difftime-with-as.POSIXct-tp15122749p15122755.html
>
> Sent from the R help mailing list archive at Nabble.com.
>
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