[R] Fwd: only plot borders of a region in a scatter plot
yinzun2000 at gmail.com
Thu Aug 4 17:46:18 CEST 2016
Dear William, Duncan and Bert,
Thanks a lot for your help and tips :D In fact the contour() plot still
cannot solve my problem perfectly. As the resolution of my plot is very
coarse, I want to a contour perfectly surround all grid cells in the river
basin. In another word, I want all angle of the contour to be 90 degree.
Another problem for the contour() is that the contour line doesn't close at
where the value of neighbouring grid cell is NA. See the right side of the
two contour lines (attachment). Do you know how I can get what I want?
Thanks a lot :P
On Thu, Aug 4, 2016 at 5:09 PM, Bert Gunter <bgunter.4567 at gmail.com> wrote:
> ... note the typo. It's:
> contour( basiinID == ID, level=0.5)
> -- Bert
> Bert Gunter
> "The trouble with having an open mind is that people keep coming along
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
> On Thu, Aug 4, 2016 at 8:03 AM, William Dunlap via R-help
> <r-help at r-project.org> wrote:
> > 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 <yinzun2000 at 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
> >> do it? Thanks a lot.
> >> Cheers,
> >> Zun Yin
> >> ______________________________________________
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> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> > PLEASE do read the posting guide
> > and provide commented, minimal, self-contained, reproducible code.
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