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Prints a useful summary of a function of spatial location.
# S3 method for distfun
summary(object, …) # S3 method for funxy
summary(object, …)
An object of class "distfun" or "funxy"
representing a function of spatial coordinates.
Arguments passed to as.mask controlling the
pixel resolution used to compute the summary.
For summary.funxy the result is
an object of class "summary.funxy".
For summary.distfun the result is
an object of class "summary.distfun".
There are print methods for these classes.
These are the summary methods
for the classes "funxy" and "distfun".
An object of class "funxy" represents a function
of spatial location, defined in a particular region of space.
This includes objects of the special class "distfun" which represent
distance functions.
The summary method computes a summary of the function values.
The function is evaluated on a grid of locations using
as.im and numerical values at these locations
are summarised using summary.im. The pixel resolution
for the grid of locations is determined by the arguments
… which are passed to as.mask.
# NOT RUN {
f <- function(x,y) { x^2 + y^2 - 1}
g <- funxy(f, square(2))
summary(g)
summary(distfun(cells))
summary(distfun(cells), dimyx=256)
# }
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