Sorry, forgot to mention: R version 2.14.2
The function julian() is part of the "chron" package of the base
distribution.
On 3/23/2012 2:47 PM, Uwe Ligges wrote:
On 23.03.2012 15:45, Andreas Eckner wrote:
Hi,
does anybody know if the following behavior of julian() is intentional?
> julian(2, 1, 2012) - julian(2 - 1e-15, 1, 2012)
[1] 1
> julian(2, 1, 2012) - julian(2, 1 - 1e-15, 2012)
[1] 0
> julian(2, 1, 2012) - julian(2, 1, 2012 - 1e-15)
[1] 0
In other words, julian() is subject to numerical noise in the 'day'
argument, but not in the 'month' and 'year' argument? Another example:
> julian(2 - 1e-15, 1, 2012) - julian(1 - 1e-15, 1, 2012)
[1] 30
Which vbersion of R are you talking about?
I get:
> julian(2, 1, 2012) - julian(2 - 1e-15, 1, 2012)
Error in UseMethod("julian") :
no applicable method for 'julian' applied to an object of class
"c('double', 'numeric')"
Uwe Ligges
Thanks,
Andreas
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