Hi Amos, This approach gives a column of NA.
On Wed, Oct 8, 2014 at 10:20 PM, Amos B. Elberg <[email protected]> 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 <[email protected]> <[email protected]> > Reply: Frederic Ntirenganya <[email protected]>> <[email protected]> > Date: October 8, 2014 at 9:38:34 AM > To: [email protected] <[email protected]>> <[email protected]> > 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: [email protected] > https://sites.google.com/a/aims.ac.za/fredo/ > > [[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. > > -- Frederic Ntirenganya Maseno University, Kenya. Mobile:(+254)718492836 Email: [email protected] https://sites.google.com/a/aims.ac.za/fredo/ [[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.
