Hi
Can anyone explain why a date becomes numeric when you loop over a series
of dates?
> dt <- Sys.Date()
> dt
[1] "2017-11-14"
> class(dt)
[1] "Date"
> dts <- dt - 1:0
> class(dts)
[1] "Date"
>
> for (i in dts) {
+ print(i)
+ print(class(i))
+ print(as.Date(i, "1970-01-01"))
+ print(class(as.Date(i, "1970-01-01")))
+ }
[1] 17483
[1] "numeric"
[1] "2017-11-13"
[1] "Date"
[1] 17484
[1] "numeric"
[1] "2017-11-14"
[1] "Date"
Why is this apparently not a bug? Are there other types that change type
when looped over?
Kind regards
Mikkel
_____________________________________________________
*Mikkel Grum*
+44 7377337321 (mobile)
mikkelgrum (Skype)
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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.
