Hi,

I believe that package is an R package. I've never worked with it so no help there but your problem seems to be data querying for which you don't really need no special function. You just need to know (if I interpreted it correctly) which rows have the date = 2010-08-07 and build another table with just that information.

Since no one apparently knows (or at least no one who might have seen this topic so far) how to solve the technical issue you're facing why not exporting the entire data to a known object (array or something) and build a small function to do the search operation?

I'm saying this because it is likely a very straightforward solution, fast and feasible with beginner level programming skills. If you feel like it is a good solution but don't know how to implement it just put the details and objective here that certainly either I or anyone else will be able to give a hand since it becomes an issue of a far less particular specialization. There are a lot of people here with programming skills (it's kind of an horizontal skill these days no matter the field of research).

Hi Anne,

Did you ever find a solution?

I'm only just reading this now, but I think the function you are looking for is actually gdltraj()

http://www.inside-r.org/packages/cran/adehabitatLT/docs/gdltraj