Look at results of
table( mydata$DateTime )
and I think you will see that some are duplicated. Specifically, the
two in your dupes object.
-Don
At 5:50 PM -0700 7/23/09, Tim Clark wrote:
Dear list,
I just had a function (as.ltraj in Adehabitat) give me the following error:
"Error in as.ltraj(xy, id, date = da) : non unique dates for a given burst"
I checked my dates and got the following:
> dupes<-mydata$DateTime[duplicated(mydata$DateTime)]
dupes
[1] (07/30/02 00:00:00) (08/06/03 17:45:00)
Is there a reason different dates would come up as duplicate values?
I would prefer not to have to delete them if I don't have to. Any
suggestions on how to get R to realize they are different?
Thanks,
Tim
Tim Clark
Department of Zoology
University of Hawaii
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--
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062
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