[R] date and time functions

[Gabor Grothendieck]

Read the article in R News 4/1.

2010/1/27 Robert Kalicki <robert.kalicki at mph.unibe.ch>:
> Dear R community
>
> I would like to perform some statistical analysis on a data set containing
> the following items: date, time, index of observation and various
> covariates.
>
> The date and time are originally extracted in the following format:
> dd.mm.yyyy  and hh:mm:ss respectively. R and more precisely the function
> read.table() seems to read the data properly. In a second step, I would like
> to sort and subset the data according to daytime, day of the week, month,
> season but I get into trouble when trying to use the built-in functions with
> this format.
>
> Which is the most convenient date and time format in R to perform such kind
> of work?
>
> Is there any specific, powerful and well documented package containing
> various date and time functions?
>
>
>
> Many thanks in advance
>
>
>
> Best regards
>
>
>
> ___________________________________________
> Robert M. Kalicki, MD
>
> Postdoctoral Fellow
>
> Department of Nephrology and Hypertension
>
> Inselspital
>
> University of Bern
>
> Switzerland
>
>
>
> Address:
>
> Klinik und Poliklinik für Nephrologie und Hypertonie
>
> KiKl G6
>
> Freiburgstrasse 15
>
> CH-3010 Inselspital Bern
>
>
>
> Tel     +41(0)31 632 96 63
>
> Fax    +41(0)31 632 14 58
>
>
>
>
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>
>
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