On Thu, Dec 11, 2008 at 2:10 PM, Prof Brian Ripley <[EMAIL PROTECTED]> wrote: > A slightly simpler version is > > format(Sys.Date(), "%V") > > > On Thu, 11 Dec 2008, Prof Brian Ripley wrote: > >> strftime(x, "%V") >> >> E.g. >> >> strftime(as.POSIXlt(Sys.Date()), "%V") >> >> is "50", and you might want as.numeric() on it. >> >> Note that this is OS-dependent, and AFAIR Windows does not have it. >>
----- On Thu, Dec 11, 2008 at 2:15 PM, Gabor Grothendieck <[EMAIL PROTECTED]> wrote: > format(d, "%U") and format(d, "%W") give week numbers using > different conventions. See ?strptime Thank you both for your replies! I'm on windows, so prof Ripleys solution does not work (why is this OS-dependent?). Regarding Gabor's solution, neither convention follow the ISO 8601 standard, which is used in Europe (and Sweden in particular). See http://en.wikipedia.org/wiki/ISO_8601#Week_dates . So it seems that my function does fill a hole, however small.... I know that for me, working with week numbers, which are used quite heavily in Sweden, have always been a major frustration. Would it be possible to implement something similar to my solution in base, and how should I go about making it fit in to the rest of the date functions? /Gustaf -- Gustaf Rydevik, M.Sci. tel: +46(0)703 051 451 address:Essingetorget 40,112 66 Stockholm, SE skype:gustaf_rydevik ______________________________________________ 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.
