Re: [R] POSIX system oddities
Duh !!!
Thanks.
From: Peter Langfelder
Sent: Sunday, March 29, 2020 20:12
To: Sebastien Bihorel
Cc: r-help@r-project.org
Subject: Re: [R] POSIX system oddities
The time has changed from "standard" (EST) to "Daylight saving" (EDT) which
shaves off 1 hour.
Peter
On Sun, Mar 29, 2020 at 5:03 PM Sebastien Bihorel via R-help
mailto:r-help@r-project.org>> wrote:
Hi,
Why is there less number of seconds on 03/10/2019 in the internal POSIX system?
The difference between the previous or the next day eems to be exactly 1 hour.
I could not find anything in the manuals on CRAN.
> dates <- as.POSIXct(sprintf('03/%s/2019',9:12), format = '%m/%d/%Y')
> dates
[1] "2019-03-09 EST" "2019-03-10 EST" "2019-03-11 EDT" "2019-03-12 EDT"
> diff(as.numeric(dates[1:2]))
[1] 86400
> diff(as.numeric(dates[2:3]))
[1] 82800
> diff(as.numeric(dates[3:4]))
[1] 86400
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Re: [R] POSIX system oddities
The time has changed from "standard" (EST) to "Daylight saving" (EDT) which
shaves off 1 hour.
Peter
On Sun, Mar 29, 2020 at 5:03 PM Sebastien Bihorel via R-help <
r-help@r-project.org> wrote:
> Hi,
>
> Why is there less number of seconds on 03/10/2019 in the internal POSIX
> system? The difference between the previous or the next day eems to be
> exactly 1 hour. I could not find anything in the manuals on CRAN.
>
> > dates <- as.POSIXct(sprintf('03/%s/2019',9:12), format = '%m/%d/%Y')
> > dates
> [1] "2019-03-09 EST" "2019-03-10 EST" "2019-03-11 EDT" "2019-03-12 EDT"
> > diff(as.numeric(dates[1:2]))
> [1] 86400
> > diff(as.numeric(dates[2:3]))
> [1] 82800
> > diff(as.numeric(dates[3:4]))
> [1] 86400
>
>
>
> [[alternative HTML version deleted]]
>
> __
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[R] POSIX system oddities
Hi,
Why is there less number of seconds on 03/10/2019 in the internal POSIX system?
The difference between the previous or the next day eems to be exactly 1 hour.
I could not find anything in the manuals on CRAN.
> dates <- as.POSIXct(sprintf('03/%s/2019',9:12), format = '%m/%d/%Y')
> dates
[1] "2019-03-09 EST" "2019-03-10 EST" "2019-03-11 EDT" "2019-03-12 EDT"
> diff(as.numeric(dates[1:2]))
[1] 86400
> diff(as.numeric(dates[2:3]))
[1] 82800
> diff(as.numeric(dates[3:4]))
[1] 86400
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
