hello barry, thank you very much for your help!
we managed to do what you said and it basicaly worked - there only is a problem with our file, but we will create the file again and then it should work completely. i will keep you posted how it turned out. thanks again! marion 2012/1/2 Barry Rowlingson <b.rowling...@lancaster.ac.uk> > On Mon, Jan 2, 2012 at 3:54 PM, Barry Rowlingson > <b.rowling...@lancaster.ac.uk> wrote: > > > That looks suspiciously like a chunk of a GPX format file - GPS > > tracks, that kind of thing. Am I right? > > > > If so, then get the rgdal package, and read it in. You'll end up with > > a spatial data frame of some kind from which you can get the points > > and times. > > > > http://en.wikipedia.org/wiki/GPS_eXchange_Format > > Specifically, if I put that snippet of yours into a GPX file, I can do: > > > trk= readOGR("m.gpx","track_points") > > > trk > coordinates track_fid track_seg_id track_seg_point_id ele > 1 (16.343, 48.272) 0 0 0 387 > 2 (16.3436, 48.2719) 0 0 1 381 > time magvar geoidheight name cmt desc src link1_href > 1 2012/01/01 15:32:03+00 NA NA <NA> <NA> <NA> <NA> <NA> > 2 2012/01/01 15:32:34+00 NA NA <NA> <NA> <NA> <NA> <NA> > link1_text link1_type link2_href link2_text link2_type sym type fix sat > 1 <NA> <NA> <NA> <NA> <NA> <NA> <NA> <NA> 9 > 2 <NA> <NA> <NA> <NA> <NA> <NA> <NA> <NA> 9 > hdop vdop pdop ageofdgpsdata dgpsid > 1 NA NA NA NA NA > 2 NA NA NA NA NA > > - obviously there's a lot of stuff there you don't need, so you can do: > > > trk@data=trk@data[,c("ele","time","sat")] > > trk > coordinates ele time sat > 1 (16.343, 48.272) 387 2012/01/01 15:32:03+00 9 > 2 (16.3436, 48.2719) 381 2012/01/01 15:32:34+00 9 > > Barry > [[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.
