Dear forum,
I would like to use the kernel2d or spkernel2d in the Splancs-package, but
it does not recognize my polygon data.
"Error in kernel2d(as.points(ptsbin), polygonprov, h0 = 2, nx = 100, : " is
the error message.
Invalid poly argument
The data are defined as follows:
polgonprov<-list(x=polyprov$X, y=polyprov$Y) with X and Y coordinates in the
Lambert1972 notation. The points are defined in the same coordinate system
and it does recognize them, so I don't suppose that is the problem.
I can also draw the province polygon by:
plot(c(192800,254100),c(154100,221800),type="n")
polygon(polyprov$X,polyprov$Y)
Can someone help me with this? Or explain to me how exactly is the polygon
class defined in splancs? I also tried with
Polygonprov<-Polygon(list(x=polyprov$X,y:polyprov$Y)) but that does not seem
to work either.
Thanks already in advance.
Kind regards,
Elke
__________________________________
Elke Moons, PhD
Transportation Research Institute
Belgium
E-mail: elke.moons@uhasselt.be
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