Displaying 20 results from an estimated 217 matches for "tzones".
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zones
2015 Dec 07
2
inconsistency in POSIXlt
The documentation for the POSIXlt class states '"POSIXlt" objects will
often have an attribute "tzone", a character vector of length 3 giving the
time zone name from the TZ environment variable and the names of the base
time zone and the alternate (daylight-saving) time zone. Sometimes this may
just be of length one, giving the time zone
2020 Oct 02
2
timezone tests and R-devel
Yes, the potential issue I see is that
make check
fails when I explicitly set TZ. However, I set it to be the same as what
the system reports when I login.
Details: The system (RHEL) I am working on has
$ strings /etc/localtime | tail -n 1
EST5EDT,M3.2.0,M11.1.0
$ date +%Z
EDT
$ echo $TZ
US/Eastern
On Fri, Oct 2, 2020 at 9:48 AM Sebastian Meyer <seb.meyer at fau.de> wrote:
> Thank
2020 Oct 01
3
timezone tests and R-devel
The return value of Sys.time() today with a timezone of US/Eastern is
unchanged between 4.0.3-patched and devel, but on devel the following test
fails
all.equal(x, as.POSIXlt(x))
with
x = Sys.time()
This means that devel does not complete make tests (failure on
tests/reg-tests-2.R)
It is entirely possible that it is an error on my end, I use
export TZ="US/Eastern"
but I have been
2012 Jul 09
1
c(a, b) for POSIXct objects with tzone attributes?
Hello:
What is the recommended method for retaining the tzone attributes
when concatonating POSIXct objects?
> (d1 <- ISOdate(1970,1,1)) # Sets the tzone attribute = GMT
[1] "1970-01-01 12:00:00 GMT"
> (d1.2 <- c(d1, d1)) # c(..) strips the tzone attribute, displays in
the time zone of the operating system
[1] "1970-01-01 04:00:00 PST" "1970-01-01
2020 Oct 23
1
timezone tests and R-devel
...modifying all.equal.POSIXt behaviour:
- make check.tzone=FALSE the default: this is inconsistent with other
arguments of all.equal methods, always defaulting to stricter checks
- let all.equal.POSIXt generally ignore the tzone difference if tzone is
unset for one of the objects (similar to check_tzones): I think this is
a bad idea because tzone affects how POSIXt objects are printed, and
under check.tzone=TRUE, two objects shouldn't be considered "nearly
equal" if they print differently.
Best regards,
Sebastian
Am 23.10.20 um 10:28 schrieb Kasper Daniel Hansen:
> So let me t...
2018 Mar 26
1
Typo in src/extra/tzone/registryTZ.c
I stumbled upon a typo in a time zone name: Irtutsk should be Irkutsk.
A patch is attached. I also checked that this is the only bug of its
kind in this file, i.e., all the other Olson time zones occurring in
the file can also be found in Unicode Common Locale Data Repository.
- Mikko Korpela
Index: src/extra/tzone/registryTZ.c
===================================================================
2011 Feb 11
2
tzone and DST
I'm reading in ~3 years worth of data that includes hourly timestamps.
Presumably to avoid DST confusion, all the data is in PST time zone -- no
discontinuities in the spring or fall.
The data comes in a csv file, which I'm reading with
myvariable <- read.csv("my_data_file.csv",header=FALSE,
2011 May 31
3
DateTime Math in R - POSIXct
Greetings -
I'm battling POSIXct, as per the code below. My input is actually an XL
file, but the weird results below correctly model what I am seeing in my
program.
Before I punt and use lubridate or timeDate, could anyone please help me
understand why POSIXct forces my variable back to GMT?
I suspect that I'm not properly coding the tzone value, but it does not
throw an
2004 Aug 19
2
proposed change to [.POSIXct
R developers,
The "tzone" attribute is stripped from a POSIXct object when the subscript
command is called ("[.POISXct"). This results in dates being printed in the
locale specific format after a subscript operation is applied to a POSIXct
object which has cause several problems for me in the past.
Here is an example of this problem under R 1.9.1:
> x <-
2009 Mar 04
2
patch for axis.POSIXct (related to timezones)
I am finding that axis.POSIXct uses the local timezone for deciding where to
put tic marks, even if the data being plotted are in another time zone. The
solution is to use attr() to copy from the 'x' (provided as an argument) to
the 'z' (used for the 'at' locations).
I have pasted my proposed solution in section 1 below (as a diff). Then, in
section 2, I'll put some
2007 Apr 04
1
time zone problems
Folks,
I'm having trouble with how datetime objects with time zones are set
and plotted. This may be the result of my running R (2.4.0) on a
Windoze XP box. Perhaps not. Here are two example problems I need
advise on if you have time:
1) I collect data with dates (often as a fractional day of year) in
UTC. Using strptime to create date time objects appears to force the
data into
2020 Oct 02
0
timezone tests and R-devel
Thank you for the report. In R-devel, all.equal.POSIXt() by default
reports inconsistent time zones. Previously,
> x <- Sys.time()
> all.equal(x, as.POSIXlt(x, tz = "EST5EDT"))
would return TRUE. To ignore the time zone attributes in R-devel, the
argument 'check.tzone = FALSE' needs to be used.
That said, I can reproduce the 'make check' failure in R-devel on
2010 Jan 12
0
Wishlist: Function 'difftime' to honor 'tzone' attribute (PR#14182)
Full_Name: Suharto Anggono
Version: 2.8.1
OS: Windows
Submission from: (NULL) (125.165.84.118)
PR#14076 inspired me to write this.
> t1 <- as.POSIXct("1970-01-01 00:00:00", tz="GMT")
> t2 <- as.POSIXlt("1970-01-01 00:00:00", tz="GMT")
> t1 - t2
Time difference of 7 hours
Above, t1 and t2 represent the same time in the same specified
2004 Aug 17
3
Fwd: strptime() problem?
Hi all;
I've already send a similar e-mail to the list and Prof. Brian Ripley
answered me but my doubts remain unresolved. Thanks for the clarification,
but perhaps I wasn't clear enough in posting my questions.
I've got a postgres database which I read into R. The first column is
Timestamp with timezone, and my data are already in UTC format. An 'printed'
extract of R
2020 Oct 23
0
timezone tests and R-devel
So let me try to raise this issue once more, and perhaps be more clear
about what I think the issue is..
In my opinion there is now a bug in
make check
in R-development (tested today with r79361). As I see it, I specify a
reasonable TZ environment variable and this leads to make check emitting an
error.
Best,
Kasper
On Fri, Oct 2, 2020 at 11:28 AM Kasper Daniel Hansen <
kasperdanielhansen
2013 Feb 01
2
difftime() out by 1 hour
I have a problem with results from difftime being 1 hour different than expected. 2 examples are given below:
datetime <- matrix(data=rbind(c("2012-03-31 21:00:00", "2012-04-01 00:00:00", "2012-04-01 03:00:00", "2012-04-01 06:00:00"),
c("2012-10-06 21:00:00", "2012-10-07 00:00:00", "2012-10-07 03:00:00",
2017 May 18
2
[R] R-3.4.0 fails test
This has to do with your own timezone. If I run that code on my computer,
both formats are correct. If I do this after
Sys.setenv(TZ = "UTC")
Then:
> cbind(format(dlt), format(dct))
[,1] [,2]
[1,] "2016-12-06 21:45:41" "2016-12-06 20:45:41"
[2,] "2016-12-06 21:45:42" "2016-12-06 20:45:42"
The reason for that, is that
2017 May 18
2
[R] R-3.4.0 fails test
> On 18 May 2017, at 13:47 , Joris Meys <jorismeys at gmail.com> wrote:
>
> Correction: Also dlt uses the default timezone, but POSIXlt is not recalculated whereas POSIXct is. Reason for that is the different way values are stored (hours, minutes, seconds as opposed to minutes from origin, as explained in my previous mail)
>
I would suspect that there is something more subtle
2011 Oct 19
1
Square ended segments
Good Afternoon R Community,
I am working on plotting behavior codes over short durations of time (a few seconds at a time over 1-2 hrs). I am utilizing as.POSIXct to store the time. I wanted to make a quasi time line using these time. I utilized the segments function to represent these times. However the segments rounds off at the ends and does not have the crisp look I need for my purposes.
2015 Dec 07
0
inconsistency in POSIXlt
David,
I didn't have time to dig through the code completely, but those other two
are being set automatically in the C code as far as I can tell, in
particular in the code
// localtime may change tzname.
if (isgmt) {
PROTECT(tzone = mkString(tz));
} else {
PROTECT(tzone = allocVector(STRSXP, 3));
SET_STRING_ELT(tzone, 0, mkChar(tz));
SET_STRING_ELT(tzone, 1,