[R] Strange result for strptime with %p

[David Winsemius]

> On Oct 2, 2018, at 6:30 AM, Marc Girondot via R-help <r-help using r-project.org> wrote:
> 
> 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

I'm afraid this is "as documented":

%I
Hours as decimal number (01–12).

I see no reason not to use "%H"

-- 
David.
> 
> 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
> 
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David Winsemius
Alameda, CA, USA

'Any technology distinguishable from magic is insufficiently advanced.'   -Gehm's Corollary to Clarke's Third Law