summary.distfun {spatstat.geom} | R Documentation |
Summarizing a Function of Spatial Location
Description
Prints a useful summary of a function of spatial location.
Usage
## S3 method for class 'distfun'
summary(object, ...)
## S3 method for class 'funxy'
summary(object, ...)
Arguments
object |
An object of class |
... |
Arguments passed to |
Details
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
.
Value
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.
Author(s)
Adrian Baddeley Adrian.Baddeley@curtin.edu.au, Rolf Turner rolfturner@posteo.net and Ege Rubak rubak@math.aau.dk.
See Also
Examples
f <- function(x,y) { x^2 + y^2 - 1}
g <- funxy(f, square(2))
summary(g)
summary(distfun(cells))
summary(distfun(cells), dimyx=256)