date format
You haven't even begun to tell us how you are doing this. R does not itself convert dates to numbers, to wit:
as.Date("16/12/03", "%d/%m/%y")
[1] "2003-12-16"
Here's one way:
x <- as.Date("16/12/03", "%d/%m/%y")
xx <- as.POSIXlt(x)
xx$year <- xx$year-100
as.Date(xx)
On Wed, 27 Apr 2005, alessandro carletti wrote:
Hi,
I'm trying to convert a vector containing dates in
character format ("dd/mm/yy"): mdy.date (from date
package) seems to be able to do that, but it returns
to me a vector containing julian dates... but
negative!
for example:
16/12/03 is converted into -20470
it is because R recognizes year ../03 as 1903, instead
of 2003, but how can I do to solve this problem? (of
course, I could add "36525" to each data, but it's not
very elegant)
Not to say wrong.
Brian D. Ripley, ripley at stats.ox.ac.uk 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