On Thu, 16 Feb 2006, Peter Dalgaard wrote: > "Jonathan Williams" <[EMAIL PROTECTED]> writes: > >> Dear R Helpers, >> >> I have imported an SPSS file that contains date data. >> The data appear in R in a numeric format, as follows: >> >> 10485849600 10477641600 10561104000 10562745600 etc. >> >> I'd be extremely grateful if someone could tell me >> how to make these numbers into comprehensible dates! > >> c(10485849600,10477641600,10561104000,10562745600)+ISOdate(1582,10,14) > [1] "1915-01-26 13:00:00 CET" "1914-10-23 13:00:00 CET" > [3] "1917-06-15 13:00:00 CET" "1917-07-04 13:00:00 CET" > > Does this look right? (If you don't want the times, use as.Date). > > BTW: There's a strange asymmetry: > >> ISOdate(1582,10,14)+ >> c(10485849600,10477641600,10561104000,10562745600) > [1] "1915-01-26 12:00:00 GMT" "1914-10-23 12:00:00 GMT" > [3] "1917-06-15 12:00:00 GMT" "1917-07-04 12:00:00 GMT" > > (have we seen this before?).
Yes, and the second is correct. Timezones are taken from the lhs in +.POSIXt. (That could probably now safely be changed.) -- 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 ______________________________________________ [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
