-----Original Message-----
From: Michael Sumner [mailto:mdsumner at gmail.com]
Sent: Monday, August 08, 2011 1:45 AM
To: Natasa Djakovic
Cc: r-sig-ecology at r-project.org
Subject: Re: [R-sig-eco] as.ltraj-adehabitatLT
The error message says it all - there are duplicated date/times in the
"da" input for a given id. You should investigate these and either
edit or remove them so that the trajectory makes sense.
Something like this can show which ids/datetimes are duplicated, but
without having your data it's just a guess (and untested):
lapply(split(data.frame(da, data.sini$Name), data.sini$Name),
function(x) x[is.duplicated(x),])
On Mon, Aug 8, 2011 at 6:58 AM, Natasa Djakovic <natasa.djakovic at umb.no>
wrote:
Hi,
I'm trying to create an object of class ltray to store animal
movements, but keep getting an error message: "Error in as.ltraj(xy =
data.sini[, c("X", "Y")], date = da, id = data.sini$Name) : non unique
dates for a given burst."
Does anyone have a suggestion how to solve this problem?
Kind regards,
Natasa