[R] Strange result for strptime with %p

[Jeff Newmiller]

... except that the %p is ignored or generates an error (implementation-dependent) if you use %H, so this may only address a few of the values you are processing and then only on some platforms.

On October 2, 2018 8:22:02 AM PDT, Rui Barradas <ruipbarradas using sapo.pt> wrote:
>Hello,
>
>Or %H, it also works.
>
>strptime("05/01/18 00:59:59 AM", format = ("%m/%d/%y %H:%M:%S %p"), 
>tz="Asia/Jayapura")
>#[1] "2018-05-01 00:59:59 WIT"
>
>
>Hope this helps,
>
>Rui Barradas
>
>Às 15:20 de 02/10/2018, PIKAL Petr escreveu:
>> 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.
>>>> 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
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>>>> PLEASE do read the posting guide
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>>>> 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
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>> 
>> 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/
>> 
>> ______________________________________________
>> 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.
>>
>
>______________________________________________
>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.

-- 
Sent from my phone. Please excuse my brevity.