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_...@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 > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.