[Rd] Date method of as.POSIXct does not respect tz

Roland Fuß ro|@nd@|u@@ @end|ng |rom thuenen@de
Tue Sep 20 09:25:52 CEST 2022


Hello,

May I follow up on this? Has it fallen through the cracks or were there 
considerations against passing `tz` to `.POSIXct`?

Regards,

Roland

Am 17.05.2018 um 19:55 schrieb Martin Maechler:
>>>>>> Roland Fuß
>>>>>>      on Wed, 16 May 2018 17:21:07 +0200 writes:
>      > R 3.5.0 Is it intended that the Date method of as.POSIXct
>      > does not respect the tz parameter? I suggest changing
>      > as.POSIXct.Date
>
> which is
>
>       function (x, ...) .POSIXct(unclass(x) * 86400)
>
>      > to this:
>
>      function (x, tz = "", ...)
>           .POSIXct(unclass(x) * 86400, tz = tz)
>
> or rather just forward the '...', i.e., use
>
>      function (x, ...) .POSIXct(unclass(x) * 86400, ...)
>
> ??
>
>      > Currently, the best workaround seems to be using the
>      > character method if one doesn't want the default timezone
>      > (which is often an annoying DST timezone).
>
>      > This came up on Stack Overflow:
>      > https://stackoverflow.com/q/50373340/1412059
>
>      > --
>      > Roland
>
> Thank you Roland for your notice (and the help on SO).
>
> Best,
> Martin

-- 
Dr. Roland Fuß

Thünen-Institut für Agrarklimaschutz/
Thünen Institute of Climate-Smart Agriculture

Bundesallee 65
D-38116 Braunschweig, Germany

Tel.: ++49 531 596 2627
Fax:  ++49 531 596 2699
Email: roland.fuss using thuenen.de

Arbeitsgruppe "Emissionsberichterstattung"/
Working group "Emission Inventories"
Email: emissionsinventare using thuenen.de

Das Johann Heinrich von Thünen-Institut,
Bundesforschungsinstitut für Ländliche Räume,
Wald und Fischerei – kurz: Thünen-Institut –
besteht aus 15 Fachinstituten, die in den
Bereichen Ökonomie, Ökologie und Technologie
forschen und die Politik beraten.

The Johann Heinrich von Thünen Institute,
Federal Research Institute for Rural Areas,
Forestry and Fisheries – Thünen Institute in brief –
consists of 15 specialized institutes that
carry out research and provide policy advice
in the fields of economy, ecology and technology.



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