On Aug 13, 2010, at 3:36 PM, Dimitri Liakhovitski wrote:
Hello!
If I have in my data frame MyFrame a variable saved as a Date and want
to translate it into years, I currently do it like this using "zoo":
library(zoo)
as.year <- function(x) as.numeric(floor(as.yearmon(x)))
myFrame$year<-as.year(myFrame$date)
Is there a function that would do it directly - like "as.yearmon" -
but for years?
I suspect most would just use format:
?format
> dd <- as.Date("2010-01-01")
> format(dd, "%Y")
[1] "2010"
--
David Winsemius, MD
West Hartford, CT
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