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Converts an object of class "leverage.ppm"
to a function of the
# S3 method for leverage.ppm
as.function(x, ...)
Object of class "leverage.ppm"
produced by leverage.ppm
.
Ignored.
A function in the R language, also belonging to the
class "funxy"
.
An object of class "leverage.ppm"
represents the leverage
function of a fitted point process model. This command converts the object
to a function(x,y)
where the arguments x
and y
are (vectors of) spatial
coordinates. This function returns the leverage values at the
specified locations (calculated by referring to the nearest location
where the leverage has been computed).
# NOT RUN {
X <- rpoispp(function(x,y) { exp(3+3*x) })
fit <- ppm(X ~x+y)
lev <- leverage(fit)
f <- as.function(lev)
f(0.2, 0.3) # evaluate at (x,y) coordinates
y <- f(X) # evaluate at a point pattern
# }
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