[R] transforming dates into years

[Dimitri Liakhovitski]

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?

Thank you!


-- 
Dimitri Liakhovitski
Ninah Consulting
www.ninah.com