[R] How long is a day?

[Laimonis Kavalieris]

Why is 19 March, 1947 a little longer than one day?

 x <-  as.POSIXct("1947-04-16")

 julian(x, origin = as.POSIXct("1947-03-20"))
Time difference of 27 days

 julian(x, origin = as.POSIXct("1947-03-19"))
Time difference of 28.04167 days

 > julian(x, origin = as.POSIXct("1947-03-18"))
Time difference of 29.04167 days

I am running R-1.7.1 compiled on RedHat 9.0

Laimonis

-- 
Dr Laimonis Kavalieris
Department of Mathematics and Statistics
University of Otago
PO Box 56 Dunedin
New Zealand

Tel (64)(3)479 7780
Fax (64)(3)479 8427