I am clearly misunderstanding something about dates and my reading of the help and RSiteSearch have not turned up anything.
I have a variable of class "Date" and I want to add include it in a data.frame. However when do a cbind the date var is coerced into a numeric. However when I tried to create a example I also seem to be doing something wrong as I cannot seem even to create a date class var even when I try to copy an example from the Help Example from Help dates <- c("02/27/92", "02/27/92", "01/14/92", "02/28/92", "02/01/92") max <-as.Date(dates, "%m/%d/%y") max class(max) Results > dates <- c("02/27/92", "02/27/92", "01/14/92", "02/28/92", "02/01/92") > max <-as.Date(dates, "%m/%d/%y") > max [1] "1992-02-27" "1992-02-27" "1992-01-14" "1992-02-28" "1992-02-01" > class(max) [1] "Date" My example cc <- c("2005/01/24" ,"2006/01/23" ,"2006/01/23", "2006/01/23") xx <- as.Date(cc, "%y/%m/%d") xx class(xx) Results > cc <- c("2005/01/24" ,"2006/01/23" ,"2006/01/23", "2006/01/23") > xx <- as.Date(cc, "%y/%m/%d") > xx [1] NA NA NA NA > class(xx) [1] "Date" And on to the cbind problem jj <- 1:5 cbind(jj,max) jj max [1,] 1 8092 [2,] 2 8092 [3,] 3 8048 [4,] 4 8093 [5,] 5 8066 I have tried various as.Date etc approcaes It is probably something blindingly simple but can anyone suggest something? Thanks ______________________________________________ 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 and provide commented, minimal, self-contained, reproducible code.