Use POSIX. To convert:
my.dates <- strptime(your.characters, format='%d/%m/%Y')
once you have that, you can use 'min' to find the minimum.
'difftime' will give you the differences.
Jim
__________________________________________________________
James Holtman "What is the problem you are trying to solve?"
Executive Technical Consultant -- Convergys Labs
james.holtman at convergys.com
+1 (513) 723-2929
Richard Hillary
<r.hillary at imperial.a To: r-help at stat.math.ethz.ch
c.uk> cc:
Sent by: Subject: [R] Manipulating dates
r-help-bounces at stat.m
ath.ethz.ch
06/14/2005 10:07
Please respond to
r.hillary
Hello,
Given a vector of characters, or factors, denoting the date in
the following way: 28/03/2000, is there a method of
1) Computing the earliest of these dates;
2) Using this as a base, then converting all the other dates into merely
the number of days after this minimum date
Many thanks
Richard Hillary
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