[R] Duplicated date values aren't duplicates

Don MacQueen macq at llnl.gov
Fri Jul 24 16:00:33 CEST 2009


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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