Tilmann Faul
2021-Apr-29 19:22 UTC
[R] Date Time, as.POSIXct used locale, strange plot behavior
Hy,
stumbled over the following problem while plotting DateTime Objects.
plot(as.POSIXct(c("2021-04-21 00:00:00", "2021-04-21
23:59:59")), c(0,
1), type='l')
arrows(as.POSIXct("2021-04-21 00:00:00", tz="CEST"),
0.3,
as.POSIXct("2021-04-21 00:00:00", tz="CEST"),
0.2,
length=0.07, angle=15)
# arrow at 02:00, why?
arrows(as.POSIXct("2021-04-21 00:00:00"),
0.3,
as.POSIXct("2021-04-21 00:00:00"),
0.2,
length=0.07, angle=15, col='red')
# arrow at 00:00 as expected
as.POSIXct(c("2021-04-21 00:00:00", "2021-04-21
23:59:59"))[1]
# [1] "2021-04-21 CEST"
as.POSIXct("2021-04-21 00:00:00", tz="CEST")
# [1] "2021-04-21 CEST"
as.POSIXct("2021-04-21 00:00:00")
# [1] "2021-04-21 CEST"
all representations on my system are the same, why is the plot location
of the arrows different??
I am located in Germany, my locale:
Sys.getlocale()
[1]
"LC_CTYPE=de_DE.UTF-8;LC_NUMERIC=C;LC_TIME=de_DE.UTF-8;LC_COLLATE=de_DE.UTF-8;LC_MONETARY=de_DE.UTF-8;LC_MESSAGES=de_DE.UTF-8;LC_PAPER=de_DE.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=de_DE.UTF-8;LC_IDENTIFICATION=C"
Any Idea?
Best regards
Tilmann
Jeff Newmiller
2021-Apr-29 21:19 UTC
[R] Date Time, as.POSIXct used locale, strange plot behavior
What is your TZ environment variable set to? That's what time conversion defaults to ?DateTimeClasses Also, I am not sure CEST is a valid timezone designation... it can be system dependent, but using one of the elements listed in ?OlsonNames. On April 29, 2021 12:22:44 PM PDT, Tilmann Faul <Tilmann_Faul at t-online.de> wrote:>Hy, > >stumbled over the following problem while plotting DateTime Objects. > >plot(as.POSIXct(c("2021-04-21 00:00:00", "2021-04-21 23:59:59")), c(0, >1), type='l') > >arrows(as.POSIXct("2021-04-21 00:00:00", tz="CEST"), > 0.3, > as.POSIXct("2021-04-21 00:00:00", tz="CEST"), > 0.2, > length=0.07, angle=15) > ># arrow at 02:00, why? > >arrows(as.POSIXct("2021-04-21 00:00:00"), > 0.3, > as.POSIXct("2021-04-21 00:00:00"), > 0.2, > length=0.07, angle=15, col='red') > ># arrow at 00:00 as expected > >as.POSIXct(c("2021-04-21 00:00:00", "2021-04-21 23:59:59"))[1] ># [1] "2021-04-21 CEST" >as.POSIXct("2021-04-21 00:00:00", tz="CEST") ># [1] "2021-04-21 CEST" >as.POSIXct("2021-04-21 00:00:00") ># [1] "2021-04-21 CEST" > >all representations on my system are the same, why is the plot location >of the arrows different?? >I am located in Germany, my locale: >Sys.getlocale() >[1] >"LC_CTYPE=de_DE.UTF-8;LC_NUMERIC=C;LC_TIME=de_DE.UTF-8;LC_COLLATE=de_DE.UTF-8;LC_MONETARY=de_DE.UTF-8;LC_MESSAGES=de_DE.UTF-8;LC_PAPER=de_DE.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=de_DE.UTF-8;LC_IDENTIFICATION=C" > >Any Idea? > >Best regards >Tilmann > >______________________________________________ >R-help at 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.