On Tue, 1 Jan 2008, jim holtman wrote:
Is this what you want?x <- c('5/5/2007', '12/31/2007') # convert to day of year (Julian date) -- use POSIXlt strptime(x, "%m/%d/%Y")$yday+1[1] 125 365
I don't think that is the usual definition of JDN: see http://en.wikipedia.org/wiki/Julian_day. A way to compute that version is as.numeric(as.Date(x, format= "%m/%d/%Y")) + 2440588
On Jan 1, 2008 4:59 PM, Nüzhet Dalfes <[EMAIL PROTECTED]> wrote:Hi, Is there a package for converting day-month-year type date to julian day number (JDN)? I looked around and I couldn't find any (I am pretty new to R...) Thanks and happy New Year to everybody! H. Nüzhet Dalfes Professor, Istanbul Technical University Eurasia Institute of Earth Sciences +90 (532) 206-1308 [EMAIL PROTECTED] ______________________________________________ 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.
-- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
______________________________________________ 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.
