On Mon, 8 Oct 2007, Albrecht, Dr. Stefan (APEP) wrote:
Dear all,
according to the Help-page of DateTimeClasses {base} I should be able to do
time - z
with
time date-time objects
z a numeric vector (in seconds) or an object of class "difftime".
However, on R version 2.6.0 (Windows XP) I get
Sys.time() - as.difftime(c("0:3:20", "11:23:15"))
Time differences in mins
[1] 1191837998 1191837318
attr(,"tzone")
[1] ""
Warning message:
Incompatible methods ("-.POSIXt", "Ops.difftime") for "-"
This works, on the other hand:
Sys.time() - as.numeric(as.difftime(c("0:3:20", "11:23:15")))
[1] "2007-10-08 12:16:18 Westeuropäische Normalzeit" "2007-10-08 12:04:58
Westeuropäische Normalzeit"
Am I understanding something wrongly?
No, that currently does not work (it did when the page was written).
This does
Sys.time() - unclass(as.difftime(c("0:3:20", "11:23:15")))
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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