On 07-09-2012, at 10:26, Rantony wrote: > Hi, > > i need a small help. > > a<- as.Date("2012-01-01") > b<- as.Date("2012-12-01") > ------------------------------------ > My requirement what is, i need to get the month difference of these two > dates.
One way is: library(zoo) (as.yearmon(b)-as.yearmon(a))*12 or a.lt <- as.POSIXlt(a) b.lt <- as.POSIXlt(b) b.lt$mon-a.lt$mon Searching in Google with "R date difference months" gives quite a few interesting results. Berend ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.