x <- as.Date(Inf, origin = "1970-01-01") x #> [1] NA str(x) #> Date[1:1], format: NA unclass(x) #> [1] Inf
It's not clear what the correct behaviour is. The documentation for ?Date has: "It is intended that the date should be an integer,", which suggests that -Inf and Inf are not valid dates. But if that's true the behaviour for max.Date() needs some thought: max(as.Date(NA), na.rm = TRUE) #> Warning in max.default(structure(NA_real_, class = "Date"), na.rm = TRUE): #> no non-missing arguments to max; returning -Inf #> [1] NA If dates are integers, then there is no date that is smaller than all other dates, so it's not clear what max() should return - NA? Hadley -- http://had.co.nz/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
