Convert Leverage Object to Function of Coordinates
Converts an object of class "leverage.ppm" to a function of the
x and y coordinates.
## S3 method for class 'leverage.ppm' as.function(x, ...)
x |
Object of class |
... |
Ignored. |
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).
A function in the R language, also belonging to the
class "funxy".
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner r.turner@auckland.ac.nz and Ege Rubak rubak@math.aau.dk.
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 patternPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.