If 'basinID' is the matrix of basin identifiers you could draw an outline of the basin with identifier 'ID' with coutour( basiinID == ID, level=0.5) Add 'add=TRUE' if you are overlaying this on an existing plot.
Bill Dunlap TIBCO Software wdunlap tibco.com On Thu, Aug 4, 2016 at 1:51 AM, Zun Yin <yinzun2...@gmail.com> wrote: > D > ear all, > > I have a matrix with ID of river basins (integer numbers). Now I want to > highlight one river basin in a map by plotting only the border. Like the > attached figure. Two river basins are highlighted by polygons. It is > created by ferret, but I prefer to implement it by R. Anybody know how to > do it? Thanks a lot. > > Cheers, > > Zun Yin > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
