The following appears to be pretty "standard" (though not included in
chron) to me:
b = ISOdate(2001,12,12)
format(b, '%j')
or is that what you refer to with
"I know I can make my own using julian" ?
No idea about the other questions though ...
Jannis
On 08.06.2012 10:01, Agustin Lobo wrote:
Hi!
Is not there an standard R function to retrieve the day of the year
(since 1st Jan of the same year)?
I know I can make my own using julian, but find it weird that having
days(), months() etc doy() does not exist as an standard function.
Also, is the following not a bit inconsistent?
a<- chron("20100506",format="ymd")
a
[1] 100506
years(a)
[1] 2010
Levels: 2010
but instead have to cast to Date to apply julian:
julian(a)
Error in names(d) : 'd' is missing
julian(as.Date(a))
[1] 14735
attr(,"origin")
[1] "1970-01-01"
Thanks
Agus
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