Hello all!
As beginner I'm struggling for a while with time zones issue and can't find
a suitable solution.
I would be grateful for any help.
Dataset imported from excel has a variable transplant.date which has been
recorded with CET time zone.
> subDataset$transplant.date
[1] "2000-01-01 CET" "2000-01-01 CET" "2000-01-02 CET" "2000-01-02 CET"
"2000-01-02 CET" "2000-01-02 CET" "2000-01-04 CET" "2000-01-04 CET"
"2000-01-04 CET" "2000-01-04 CET" "2000-01-04 CET" "2000-01-05 CET"
"2000-01-05 CET"
[14] "2000-01-05 CET" "2000-01-05 CET"
However
> Sys.time()
[1] "2011-07-06 15:22:44 CEST"
I need to calculate time difference in days but I'm still getting wrong
calculations. Most likely is this time zone issue.
> as.numeric(as.Date("2000-1-1")-as.Date(subDataset$transplant.date))
[1] 1 1 0 0 0 0 -2 -2 -2 -2 -2 -3 -3 -3 -3
Truncation doesn't help either
>
trunc(as.Date("2000-1-1"),"days")-trunc(as.Date(subDataset$transplant.date),"days")
Time differences in days
[1] 1 1 0 0 0 0 -2 -2 -2 -2 -2 -3 -3 -3 -3
Are there any useful tips to cope with this?
Thank you very much!
Laura
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