The code changes a single row; that's why I said you'd have to adapt it to your application.
> On Oct 9, 2014, at 3:10 AM, Frederic Ntirenganya <ntfr...@gmail.com> wrote: > > Hi Amos, > > This approach gives a column of NA. > >> On Wed, Oct 8, 2014 at 10:20 PM, Amos B. Elberg <amos.elb...@gmail.com> >> wrote: >> You can adapt: format(as.Date(paste(Year, sep = "-", ifelse(Year %% 4 == >> 0, Start, ifelse(Start > 59, Start - 1, Start))), "%Y-%j"), "%b %d”) >> >> But 60% of the dates in your data.frame will then be wrong. >> >> >> From: Frederic Ntirenganya <ntfr...@gmail.com> >> Reply: Frederic Ntirenganya <ntfr...@gmail.com>> >> Date: October 8, 2014 at 9:38:34 AM >> To: r-help@r-project.org <r-help@r-project.org>> >> Subject: [R] Data formart >> >>> Dear All, >>> >>> Change the format of the start and end columns so that data appear as the >>> day of the year. For instance: Apr 24 rather than 115. >>> >>> The idea is that I want the non=leap years to be 366 days instead of being >>> 365 days. ie. Each year must have 366 days. for example: in the column >>> Start2, Apr 18 will be Apr 17. >>> >>> > head(Samaru) >>> Year Start End Length Start2 End2 >>> 1 1930 108 288 180 Apr 18 Oct 15 >>> 2 1931 118 288 170 Apr 28 Oct 15 >>> 3 1932 115 295 180 Apr 24 Oct 21 >>> 4 1933 156 294 138 Jun 05 Oct 21 >>> 5 1934 116 291 175 Apr 26 Oct 18 >>> 6 1935 134 288 154 May 14 Oct 15 >>> >>> Any idea is welcome. Thamks!!!! >>> -- >>> Frederic Ntirenganya >>> Maseno University, >>> Kenya. >>> Mobile:(+254)718492836 >>> Email: fr...@aims.ac.za >>> https://sites.google.com/a/aims.ac.za/fredo/ >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> 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. > > > > -- > Frederic Ntirenganya > Maseno University, > Kenya. > Mobile:(+254)718492836 > Email: fr...@aims.ac.za > https://sites.google.com/a/aims.ac.za/fredo/ [[alternative HTML version deleted]] ______________________________________________ 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.
