On Jul 7, 2010, at 7:25 AM, Elisenda Vila wrote:
I am trying to work with the Date class which is written in S3 and I
would
like to access to the elements of the class (for example the year).
I've
tryed to do it for example like this:
as.Date(Sys.time)->w
Throws an error ... since Sys.time is a function
w$year #Doesn't work
Why should it? Dates are not stored as lists.
?Date
w["year"] #is NA
I would like to know the correct way to acces to this value.
as.Date(Sys.time)->w
Error in as.Date.default(Sys.time) :
do not know how to convert 'Sys.time' to class "Date"
> as.Date(Sys.time())->w
> w
[1] "2010-07-07"
> format(w, "%Y")
[1] "2010"
--
David Winsemius, MD
West Hartford, CT
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