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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