D <- "06.12.1948" # which is dd.mm.yyyy
as.Date(D, "%d.%m.%y") # convert to date
[1] "2019-12-06" # ????
что мне не хватает?
Sys.getlocale (category = "LC_ALL") [1] "LC_COLLATE = German_Austria.1252; LC_CTYPE = German_Austria.1252; LC_MONETARY = German_Austria.1252; LC_NUMERIC = C; LC_TIME = German_Austria.1252"