It is difficult to advise you when you don't provide reproducible data.
 For example, you could include the first 6 lines of your data using
     dput(head(mydata))

If you have GPS points stored as easting, northing, and if you have a
variable that identifies the vessel, and if your data are sorted by date
and time, then you might be able to get the plot you want using something
like this:

plot(easting[vessel="This One"], northing[vessel="This One"], type="l")

Jean


On Thu, Oct 24, 2013 at 4:40 AM, Marta Tobeña <marta_mtm@hotmail.com> wrote:

> Hi professors
> I'm finding the best package in R for manage a big database about vessels.
> I need to divided the travel of each boat into tracks. I have GPS points.
>
> I would join these points in a line on the map. I make that with the
> function "lines", but I can't divided by vessel or by track,
>
> I saw several packages, for tracking animals but they had specifically
> variables. And I don't add others like  "type","destination" or "status".
>
> Can you give me a suggestion, please
>
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>
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>

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