Bert Gunter
2015-Nov-03 22:54 UTC
[R] CRAN - Package "activity" - how do you convert time (hh:mm) into radians in R 3.1.2 on Windows 7 OS 64bit
... should have said: with a 24 hour "clock". -- Bert Bert Gunter "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." -- Clifford Stoll On Tue, Nov 3, 2015 at 2:52 PM, Bert Gunter <bgunter.4567 at gmail.com> wrote:> Hint: 24 hours = 24x60 = 1440 minutes = 2 pi radians. > > Cheers, > Bert > Bert Gunter > > "Data is not information. Information is not knowledge. And knowledge > is certainly not wisdom." > -- Clifford Stoll > > > On Tue, Nov 3, 2015 at 2:00 PM, Typhenn Brichieri-Colombi via R-help > <r-help at r-project.org> wrote: >> Hello, >> I am using the "activity" package developed by Marcus Rowcliffe (released in February, 2015). This package uses time in radians to estimate activity. I have camera trap data in 24 hour times (hh:mm) - how do I convert these into radians? (e.g. My time-of-detection at 19:44, how do I convert this into radians?) >> Thank you for your time and your help >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> 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.
Martin Maechler
2015-Nov-04 08:02 UTC
[R] CRAN - Package "activity" - how do you convert time (hh:mm) into radians in R 3.1.2 on Windows 7 OS 64bit
>>>>> Bert Gunter <bgunter.4567 at gmail.com> >>>>> on Tue, 3 Nov 2015 14:54:46 -0800 writes:> ... should have said: with a 24 hour "clock". > -- Bert > Bert Gunter Hmm, thank you Bert. I know nothing about measuring time in radians, and for me, 'radians' are angles, and hence we are talking about analogue watches when measuring time with them, and now, as a citizen from "the watch maker country" I do like analogue watches or let's nowadays say "graphical" watches, i.e., with clock faces and short and long (hour and minute) hands, and I think I have only ever seen 12 h watches at least on church towers (yes, here in CH) or wrist watches... (?) Martin (Maechler, ETH Zurich, Switzerland) > On Tue, Nov 3, 2015 at 2:52 PM, Bert Gunter <bgunter.4567 at gmail.com> wrote: >> Hint: 24 hours = 24x60 = 1440 minutes = 2 pi radians. >> >> Cheers, >> Bert >> Bert Gunter >> >> "Data is not information. Information is not knowledge. And knowledge >> is certainly not wisdom." >> -- Clifford Stoll >> >> >> On Tue, Nov 3, 2015 at 2:00 PM, Typhenn Brichieri-Colombi via R-help >> <r-help at r-project.org> wrote: >>> Hello, >>> I am using the "activity" package developed by Marcus Rowcliffe (released in February, 2015). This package uses time in radians to estimate activity. I have camera trap data in 24 hour times (hh:mm) - how do I convert these into radians? (e.g. My time-of-detection at 19:44, how do I convert this into radians?) >>> Thank you for your time and your help >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> 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. > ______________________________________________ > 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.
Jim Lemon
2015-Nov-04 10:35 UTC
[R] CRAN - Package "activity" - how do you convert time (hh:mm) into radians in R 3.1.2 on Windows 7 OS 64bit
Ah, Martin, how is it possible that you have never encountered the 24 hour cuckoo clock? http://www.lutececreations.com/fiche-schneider_black_forest_cuckoo_clock__24_hour_cuckoo_clock_mt_1139_9++de+la+marque-4297.html Jim On Wed, Nov 4, 2015 at 7:02 PM, Martin Maechler <maechler at stat.math.ethz.ch> wrote:> >>>>> Bert Gunter <bgunter.4567 at gmail.com> > >>>>> on Tue, 3 Nov 2015 14:54:46 -0800 writes: > > > ... should have said: with a 24 hour "clock". > > -- Bert > > Bert Gunter > > Hmm, thank you Bert. > > I know nothing about measuring time in radians, and for me, > 'radians' are angles, and hence we are talking about > analogue watches when measuring time with them, and now, as a > citizen from "the watch maker country" I do like analogue > watches or let's nowadays say "graphical" watches, i.e., with clock > faces and short and long (hour and minute) hands, and I think I > have only ever seen 12 h watches at least on church towers (yes, > here in CH) or wrist watches... > (?) > > Martin > (Maechler, ETH Zurich, Switzerland) > > > On Tue, Nov 3, 2015 at 2:52 PM, Bert Gunter <bgunter.4567 at gmail.com> > wrote: > >> Hint: 24 hours = 24x60 = 1440 minutes = 2 pi radians. > >> > >> Cheers, > >> Bert > >> Bert Gunter > >> > >> "Data is not information. Information is not knowledge. And > knowledge > >> is certainly not wisdom." > >> -- Clifford Stoll > >> > >> > >> On Tue, Nov 3, 2015 at 2:00 PM, Typhenn Brichieri-Colombi via R-help > >> <r-help at r-project.org> wrote: > >>> Hello, > >>> I am using the "activity" package developed by Marcus Rowcliffe > (released in February, 2015). This package uses time in radians to estimate > activity. I have camera trap data in 24 hour times (hh:mm) - how do I > convert these into radians? (e.g. My time-of-detection at 19:44, how do I > convert this into radians?) > >>> Thank you for your time and your help > >>> [[alternative HTML version deleted]] > >>> > >>> ______________________________________________ > >>> 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. > > > ______________________________________________ > > 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. > > ______________________________________________ > 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. >[[alternative HTML version deleted]]
jwd
2015-Nov-04 15:51 UTC
[R] CRAN - Package "activity" - how do you convert time (hh:mm) into radians in R 3.1.2 on Windows 7 OS 64bit
On Wed, 4 Nov 2015 09:02:46 +0100 Martin Maechler <maechler at stat.math.ethz.ch> wrote:> >>>>> Bert Gunter <bgunter.4567 at gmail.com> > >>>>> on Tue, 3 Nov 2015 14:54:46 -0800 writes: > > > ... should have said: with a 24 hour "clock". > > -- Bert > > Bert Gunter > > Hmm, thank you Bert. > > I know nothing about measuring time in radians, and for me, > 'radians' are angles, and hence we are talking about > analogue watches when measuring time with them, and now, as a > citizen from "the watch maker country" I do like analogue > watches or let's nowadays say "graphical" watches, i.e., with clock > faces and short and long (hour and minute) hands, and I think I > have only ever seen 12 h watches at least on church towers (yes, > here in CH) or wrist watches... > (?) > > MartinThe issue is apparently to analyze activity over a 24 hour cycle. The OP mentions the use of a camera trap so they are evidently analyzing trap events by time of event. The radian constraint is mentioned in the Activity package docs. JWDougherty
Jeff Newmiller
2015-Nov-04 15:53 UTC
[R] CRAN - Package "activity" - how do you convert time (hh:mm) into radians in R 3.1.2 on Windows 7 OS 64bit
Think astronomy.
https://en.m.wikipedia.org/wiki/Hour_angle
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On November 4, 2015 12:02:46 AM PST, Martin Maechler <maechler at
stat.math.ethz.ch> wrote:>>>>>> Bert Gunter <bgunter.4567 at gmail.com>
>>>>>> on Tue, 3 Nov 2015 14:54:46 -0800 writes:
>
> > ... should have said: with a 24 hour "clock".
> > -- Bert
> > Bert Gunter
>
>Hmm, thank you Bert.
>
>I know nothing about measuring time in radians, and for me,
>'radians' are angles, and hence we are talking about
>analogue watches when measuring time with them, and now, as a
>citizen from "the watch maker country" I do like analogue
>watches or let's nowadays say "graphical" watches, i.e., with
clock
>faces and short and long (hour and minute) hands, and I think I
>have only ever seen 12 h watches at least on church towers (yes,
>here in CH) or wrist watches...
>(?)
>
>Martin
>(Maechler, ETH Zurich, Switzerland)
>
>> On Tue, Nov 3, 2015 at 2:52 PM, Bert Gunter <bgunter.4567 at
gmail.com>
>wrote:
> >> Hint: 24 hours = 24x60 = 1440 minutes = 2 pi radians.
> >>
> >> Cheers,
> >> Bert
> >> Bert Gunter
> >>
>>> "Data is not information. Information is not knowledge. And
>knowledge
> >> is certainly not wisdom."
> >> -- Clifford Stoll
> >>
> >>
>>> On Tue, Nov 3, 2015 at 2:00 PM, Typhenn Brichieri-Colombi via
R-help
> >> <r-help at r-project.org> wrote:
> >>> Hello,
>>>> I am using the "activity" package developed by Marcus
Rowcliffe
>(released in February, 2015). This package uses time in radians to
>estimate activity. I have camera trap data in 24 hour times (hh:mm) -
>how do I convert these into radians? (e.g. My time-of-detection at
>19:44, how do I convert this into radians?)
> >>> Thank you for your time and your help
> >>> [[alternative HTML version deleted]]
> >>>
> >>> ______________________________________________
> >>> 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.
>
> > ______________________________________________
> > 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.
>
>______________________________________________
>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.