[R-sig-ME] Off the topic: Problem with ISOdatetime

[ONKELINX, Thierry]

Dear Julia,

R-help is a better forum for this kind of questions.

Have a look at the timezones and daylight saving time. That might be the problem.

Best regards,

Thierry

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51
+ 32 54 43 61 85
Thierry.Onkelinx at inbo.be
www.inbo.be

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~ Sir Ronald Aylmer Fisher

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-----Oorspronkelijk bericht-----
Van: r-sig-mixed-models-bounces at r-project.org [mailto:r-sig-mixed-models-bounces at r-project.org] Namens Julia Sommerfeld
Verzonden: vrijdag 20 januari 2012 15:12
Aan: r-sig-mixed-models at r-project.org
Onderwerp: [R-sig-ME] Off the topic: Problem with ISOdatetime

Dear list,

This question is probably off the topic, but in order to test my data with GLMM, I need to transform the DateTime of my GPS data from:

"666.1751" into yyyy/mm/dd hh:mm:ss

I have the following code:

d$Date <- ISOdatetime(2009, 1, 1, 0, 0, 0, tz = "GMT")+d$Date*(24*3600)

This gives me: 2010-10-29 04:12:09, which is wrong. It should be 2010-10-29
06:12:09

Another example:

418.3219 corresponds to: 2010-02-23 07:43:30, but it should be 2010-02-23 08:43:30.

Any ideas or suggestions, where I could find the answer, are very much appreciated.

Best regards,

Julia

PS. I've tried to find the answer in all sorts of R help forums and also in my R books - no luck so far. Maybe I'm missunderstanding the entire ISOdatetime function?



--
Julia Sommerfeld - PhD Candidate
Institute for Marine and Antarctic Studies University of Tasmania Private Bag 129, Hobart TAS 7001

Phone: +61 477 289 301
Email: julia.somma at gmx.de
Julia.Sommerfeld at utas.edu.au

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