On Thu, 11 Feb 2010, Jonathan wrote:
Anybody have an idea why I would get a non-integer value for the
number of days here?
difftime('2004-08-05','2001-01-03',units='days')
Time difference of 1309.958 days
Because it's not a whole number of 24-hour periods, due to daylight saving
time: 0.958 is 23/24.
Would you just round off?
Yes, or use as.Date() if you only want to consider whole days
R> as.Date('2004-08-05')-as.Date('2001-01-03')
Time difference of 1310 days
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
tlum...@u.washington.edu University of Washington, Seattle
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