R: Plotting polygon configurations and their approximated areas
plot.preCKrigePolygons
R Documentation
Plotting polygon configurations and their approximated areas
Description
Plotting method for objects of the class
preCKrige.polygons. The plot show the block neighbourhood
configuration for one polygon (block) of a preCKrige.polygons object
as well as its area approximation by the pixels.
Usage
## S3 method for class 'preCKrigePolygons'
plot(x, index, ...)
Arguments
x
object of the class preCKrigePolygons. In general
the output object of a preCKrige function call.
index
numeric value, list index of the desired polygon (block) of the polygon list
x@polygons
## Not run:
### load data
data(meuse,meuse.blocks)
### plot blocks
plot(meuse.blocks)
### compute the approximated block variance of each block in
### meuse.blocks without the definition of neighbours blocks (default)
preCK_1 <- preCKrige(newdata = meuse.blocks,
model = covmodel("exponential", 0.05, 0.15, scale = 192.5),
pwidth = 75, pheight = 75)
### plot block approximation of block 59
plot(preCK_1, 59)
### define neighbours
if(require(spdep))
{
neighbours <- poly2nb(meuse.blocks)
class(neighbours)
### neighbours should be an object of the class "list"
class(neighbours) <- "list"
### compute the approximated block variance-covariance matrices of each block in
### meuse.blocks without the defined block neighbours
preCK_2 <- preCKrige(newdata = meuse.blocks, neighbours = neighbours,
model = covmodel("exponential", 0.05, 0.15, scale = 192.5),
pwidth = 75, pheight = 75)
### plot block approximation of block 59 and its
### block neighbours
plot(preCK_1, 59)
}
if(!require(spdep))
{
cat("Please, install the package spdep to excute this example.\n")
}
## End(Not run)