[R-sig-Geo] Hole attribute in Polygon lost when made into Polygons object?
MacQueen, Don
macqueen1 at llnl.gov
Wed May 27 00:25:06 CEST 2015
I must be missing something basic
(either in understanding, or possibly being blind to a typo!)
Here is the example data:
m1 <-structure(c(2.8, 8, 8.2, 3.9, 1.6,
9.2, 6.8, 3, 1.1, 4.2),
.Dim = c(5L, 2L))
Pnh <- Polygon(m1, hole=FALSE)
Ph <- Polygon(m1, hole=TRUE)
Pnhs <- Polygons(list(Pnh), ID=1)
Phs <- Polygons(list(Ph), ID=1)
Then:
> Pnh at hole
[1] FALSE
> Ph at hole
[1] TRUE
> Pnhs at Polygons[[1]]@hole
[1] FALSE
> Phs at Polygons[[1]]@hole
[1] FALSE
It appears that the hole attribute has been lost??
sp_1.1-0
R 3.1.2
Thanks
-Don
--
Don MacQueen
Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062
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