On Tue, 18 Sep 2007, Frede Aakmann Tøgersen wrote:
One way (perhaps not the most efficient)as.Date("2005-09-01","%Y-%m-%d")[1] "2005-09-01"format(as.Date("2005-09-01","%Y-%m-%d"),"%Y")[1] "2005"format(as.Date("2005-09-01","%Y-%m-%d"),"%d")[1] "01"format(as.Date("2005-09-01","%Y-%m-%d"),"%m")[1] "09"
It's pretty efficient, but should you want numeric (rather than character) answers
zz <- strptime("2005-09-01","%Y-%m-%d")
zz$year + 1900
[1] 2005
zz$mon + 1
[1] 9
zz$mday
[1] 1(I'm not sure why the POSIX people chose inconsistent origins, but they did.)
See ?DateTimeClasses. Med venlig hilsen Frede Aakmann Tøgersen-----Oprindelig meddelelse----- Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] På vegne af Arun Kumar Saha Sendt: 18. september 2007 11:01 Til: [EMAIL PROTECTED] Emne: [R] Need help on "date" Dear all, I have a variable 'x' like that:x[1] "2005-09-01" Here, 2005 represents year, 09 month and 01 day. Now I want to create three variables naming: y, m, and d such that: y = 2005 m = 09 d = 01 can anyone tell me how to do that? Regards, [[alternative HTML version deleted]] ______________________________________________ [email protected] 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.______________________________________________ [email protected] 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.
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