spplot: no boundary lines for polygons
On Tue, 5 May 2009, Agustin Lobo wrote:
I have a complex shape file imported to R via rgdal as a SPolDF. I want to display continuous attributes with a color key but the black boundaries of the polygons, which are small in general, introduce "too much black" in the plot and the spatial variation of the attribute is not correctly displayed. What I do is spplot(MMAMBCGUcombi["DIFPW"])
Yes, pass through the col="transparent" argument to the gpar() argument gp= in the underlying grid.polygon() function used.
(BTW, where is the code for fig. 3.6 in the book? Perhaps I should be using plot() instead of spplot(), but cannot find how to select the actual atribute in the SPolDF in plot())
I think that the code is shown under the Figures menu, where you also find the reference to its placing in chunk 22 in vis_mod.R
Is there any way of not plotting the boundaries of the polygons?
fortune("Yoda")
Roger
Thanks Agus
Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no