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dates function
2 messages · Massimiliano Tripoli, Brian Ripley
On Wed, 28 Jan 2004, Massimiliano Tripoli wrote:
I have problems with years of dates using "chron" package. I don't understand why R by this istruction:
It's not R, it is package chron. R has its own date-time functions.
dates("01/02/29",out.format="d/m/year")
[1] 02/Jan/2029
dates("01/02/30",out.format="d/m/year")
[1] 02/Jan/1930 reads "29" as 2029 and "30" as 1930. How could I change to read "00" to "05" like 2000 to 2005 and "06" to "99" like 1906 to 1999 ?
Read the code for convert.dates. You need to set
option("chron.year.expand") to a suitable function, the prototype being
year.expand and it will be easy to achieve what you want.
This answers your message under the misleading subject `Julian dates' too.
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 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595