Three steps: 1) as.character to get character representation 2) as.POSIXct to convert to time 3) julian() or strptime() to get Julian date.
Read the docs (esp on part 2 and 3) to get the format strings just right. Cheers, Michael On Aug 24, 2012, at 10:30 PM, Veerappa Chetty <chett...@gmail.com> wrote: > Hi, > I have dates as follows: > 1/4/2006 0:00:00 AM > It is a factor at present. > How do I find out the day of the week from this? How do I convert to Julian > date format? > Thanks. > Chetty > > -- > Professor of Family Medicine > Boston University > Tel: 617-414-6221, Fax:617-414-3345 > emails: chett...@gmail.com,vche...@bu.edu > > [[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. ______________________________________________ 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.
