[Rd] Fwd: Bug Reporting

[Thierry Onkelinx]

Dear Tommaso,

This is not a bug. You asked for a difference of 1 day = 24 hours = 1440
minutes = 86400 seconds. And that is the difference you get.

> start <- as.POSIXct(strptime("20151025",format='%Y%m%d'))
> end <- start + as.difftime(1, unit="days")
> end - start
Time difference of 1 days
> as.integer(end) - as.integer(start)
[1] 86400

Best regards,

ir. Thierry Onkelinx
Statisticus / Statistician

Vlaamse Overheid / Government of Flanders
INSTITUUT VOOR NATUUR- EN BOSONDERZOEK / RESEARCH INSTITUTE FOR NATURE AND
FOREST
Team Biometrie & Kwaliteitszorg / Team Biometrics & Quality Assurance
thierry.onkelinx using inbo.be
Havenlaan 88 bus 73, 1000 Brussel
www.inbo.be

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Op wo 21 aug. 2019 om 08:25 schreef TOMMASO ADAMI <t.adami using studenti.unibg.it
>:

> Hello,
>
>   I would like to report this date/time bug that threatened me for a long
> time,
>    as I need correct date calculation in my computations.
>
> If I add 1 day to the light saving switching day, it will incorrectly
> subtract 1 hour from the date and missalign all my calculations.
>
> You can see it runing (I am testing it with Rome, Italy (+1) TimeZone)
>
> print(paste0("Horrible R Bug is present?
> ",strptime("20151025",format='%Y%m%d')+as.difftime(1, unit="days")));
>
> As you can see the output says 11pm and not 12pm !
>
> I do not know if it is a requested feature, but for me is unpleasant and
> unexpected behaviour.
>
> Thank you very much!
>
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>
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