[R] Strange result for strptime with %p

[PIKAL Petr]

Hi

Credit belongs to documentation. I picked it from it.

Cheers
Petr

> -----Original Message-----
> From: peter dalgaard <pdalgd using gmail.com>
> Sent: Tuesday, October 2, 2018 4:15 PM
> To: PIKAL Petr <petr.pikal using precheza.cz>
> Cc: Marc Girondot <marc_grt using yahoo.fr>; r-help mailing list <r-help using r-
> project.org>
> Subject: Re: [R] Strange result for strptime with %p
>
> Nice catch, Petr:
>
> > strptime("05/01/18 00:59:59 AM", format = ("%m/%d/%y %I:%M:%S %p"),
> > tz="Asia/Jayapura")
> [1] NA
> > strptime("05/01/18 12:59:59 AM", format = ("%m/%d/%y %I:%M:%S %p"),
> > tz="Asia/Jayapura")
> [1] "2018-05-01 00:59:59 WIT"
>
> -pd
>
> > On 2 Oct 2018, at 15:39 , PIKAL Petr <petr.pikal using precheza.cz> wrote:
> >
> > Hi
> >
> > Maybe it is connected to
> > %I
> > Hours as decimal number (01–12).
> >
> > Your input has hour as 00
> >
> > Cheers
> > Petr
> >
> >> -----Original Message-----
> >> From: R-help <r-help-bounces using r-project.org> On Behalf Of Marc
> >> Girondot via R-help
> >> Sent: Tuesday, October 2, 2018 3:30 PM
> >> To: R-help Mailing List <r-help using r-project.org>
> >> Subject: [R] Strange result for strptime with %p
> >>
> >> Dear members... are these results normal ?
> >>
> >> For the first one, no problem. I expected this:
> >>
> >>> strptime("05/01/18 01:00:00 AM", format = ("%m/%d/%y %I:%M:%S %p"),
> >> tz="Asia/Jayapura")
> >> [1] "2018-05-01 01:00:00 WIT"
> >>
> >> For this one, it is ok also:
> >>
> >>> strptime("05/01/18 01:00:00 AM", format = ("%m/%d/%y %I:%M:%S %p"),
> >> tz="Asia/Jayapura")-1
> >> [1] "2018-05-01 00:59:59 WIT"
> >>
> >> But how to explain this ???
> >>
> >>> strptime("05/01/18 00:59:59 AM", format = ("%m/%d/%y %I:%M:%S %p"),
> >> tz="Asia/Jayapura")
> >> [1] NA
> >>
> >> Thanks for your advices
> >> Marc
> >> ______________________
> >>
> >> R 3.5.1 on MacOS 10.14
> >>
> >>> version
> >>                _
> >> platform       x86_64-apple-darwin15.6.0
> >> arch           x86_64
> >> os             darwin15.6.0
> >> system         x86_64, darwin15.6.0
> >> status
> >> major          3
> >> minor          5.1
> >> year           2018
> >> month          07
> >> day            02
> >> svn rev        74947
> >> language       R
> >> version.string R version 3.5.1 (2018-07-02)
> >> nickname       Feather Spray
> >>
> >> ______________________________________________
> >> R-help using 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 using 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.
>
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000
> Frederiksberg, Denmark
> Phone: (+45)38153501
> Office: A 4.23
> Email: pd.mes using cbs.dk  Priv: PDalgd using gmail.com
>
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Osobní údaje: Informace o zpracování a ochraně osobních údajů obchodních partnerů PRECHEZA a.s. jsou zveřejněny na: https://www.precheza.cz/zasady-ochrany-osobnich-udaju/ | Information about processing and protection of business partner’s personal data are available on website: https://www.precheza.cz/en/personal-data-protection-principles/
Důvěrnost: Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a podléhají tomuto právně závaznému prohláąení o vyloučení odpovědnosti: https://www.precheza.cz/01-dovetek/ | This email and any documents attached to it may be confidential and are subject to the legally binding disclaimer: https://www.precheza.cz/en/01-disclaimer/