[R] extract week from date
tlumley at u.washington.edu
Thu Apr 11 19:14:57 CEST 2002
On Thu, 11 Apr 2002, Juan Ramon Gonzalez wrote:
> Hello R-users,
> Does anyone know how obtain the week of a date?
> (in SPPS the instruction is "xdate.week")
Extract the day and divide by seven?
as.POSIXlt(a.date)$yday %/% 7
Perhaps add 1 if you want the year to start at week 1 rather than week 0.
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