The zoo package has a yearmon class with as methods which can be used: library(zoo) dd <- Sys.Date() # test data
as.Date(as.yearmon(dd), frac = 1) as.yearmon converts the "Date" class date to a year and month of class "yearmon" dropping the day and representing it internally in a way consistent with "ts" class. as.Date above then converts it back to "Date" class. Since yearmon dates have no day (they are just a year and a month) the frac argument is used to indicate what fraction of the month to use as the day of the month so frac = 0 (the default) would give the beginning of the month) and frac = 1 gives the end. On 12/19/05, t c <[EMAIL PROTECTED]> wrote: > I have a vector of dates. > > I wish to find the month end date for each. > > Any suggestions? > > e.g. > > For 12/15/05, I want 12/31/05, > > For 10/15/1995, I want 10/31/1995, etc > > > __________________________________________________ > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html