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ISBN 3-900051-07-0
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> library(sp)
> data(meuse)
> data(meuse.grid)
> coordinates(meuse) = ~x+y
> coordinates(meuse.grid) = ~x+y
> x = coordinates(meuse)
> y = coordinates(meuse.grid)
> out = spDists(meuse,meuse.grid)
> out2 = as.matrix(dist(rbind(coordinates(meuse),coordinates(meuse.grid))))
> out2 = out2[1:155,155+1:nrow(y)]
> # should be equal:
> sum(out2 - out)
[1] 0
> summary(as.vector(out2 - out))
Min. 1st Qu. Median Mean 3rd Qu. Max.
0 0 0 0 0 0
>
> out = spDists(meuse.grid,meuse)
> sum(out2 - t(out))
[1] 0
> summary(as.vector(out2 - t(out)))
Min. 1st Qu. Median Mean 3rd Qu. Max.
0 0 0 0 0 0
>
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