I'm puzzled by an apparent change of @hole from TRUE to FALSE when a
Polygon object becomes part of a Polygons object.
Here's an example, adapted from ?overlay
r2 <- cbind(c(180042, 180545, 180553, 180314, 179955, 179142, 179437,
179524, 179979, 180042),
c(332373, 332026, 331426, 330889, 33
If I understand the sequence, you want the odd columns from the odd
rows and the even columns from the even rows to "a" and the
remainder go to "b". Once you have a transposed matrix, the recipe
looks straightforward.
Clint
--
Clint BowmanINTERNET: cl...@ecy.wa.gov
dear Researcher
Sorry that I know this is not the right email-list and this is a basic help
but I am doing a remotesensing filter and I am honest, I have no idea how I
can do this.
I have a sequance form 1 to 16
> seq(1:16)
[1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
and I wish to sele
I am interpolating a SpatialGridDataFrame from an irregular volume. I
would like to retrieve the data as the shape of the original volume.
Any chance there is an easy way to do such a thing?
Mark Connolly
--
Graduate Student, Master of Science
Department of Soil Science
North Carolina State
Thanks Kamran, unfortunately I don't think the placement of 'else' has any
effect - the same errors arise.
To answer the request for more details, here's a self-contained version of what
my data pretty much looks like:
require(raster)
rs <- raster(system.file("external/test.grd", package="raste
Dear all,
I'm trying to use the overlay() function in the raster package, but can't get
'if' clauses to work. Can anyone help?
I have two rasters, the first of which I would like to modify, depending on the
value in the second (a forest cover raster). Specifically, if the value in the
first (c
