On Tue, Aug 30, 2011 at 4:43 PM, Gabor Grothendieck
<ggrothendi...@gmail.com> wrote:
> On Tue, Aug 30, 2011 at 1:36 PM, Christopher W Ryan
> <cr...@binghamton.edu> wrote:
>> Running R 2.13.1 on Windows XP.
>> I would like to get week of the year (1-52) for each date.
>>
>> library(chron)
>> dts <- dates(c("02/27/92", "02/27/92", "01/14/92","02/28/92", "02/01/92"))
>
> Try this:
>
> as.numeric(cut(dts, "weeks"))although that won't label the weeks from the beginning of the year but rather the earliest date will be labelled week 1 so you need to add a date in the first of the year if you want that. Alternately try this: as.numeric(format(as.Date(dts), "%w")) or use %W. See ?strptime for details. -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
