Have you received a reply to this post? I haven't seen one.
> t9 <- 9:10
> class(t9) <- "Date"
> t9
[1] "1970-01-10" "1970-01-11"
> as.factor(t9)
[1] 9 10
Levels: 9 10
I confirmed what you got with a slightly different example:
> t9 <- 9:10
> class(t9) <- "Date"
> t9
Dear all,
I have noticed a little change in the behaviour of as.factor from R-2.2.1 to
R-2.3.0, and can't find it in the NEWS.
In R-2.3.0:
> times <- 1:5
> class(times) <- "Date"
> as.factor(times)
[1] 1 2 3 4 5
Levels: 1 2 3 4 5
In R-2.2.1:
> as.factor(times)
[1] 1970-01-02 1970-01-03 1970-01-04
