spatstat.geom (version 2.0-1)

summary.distfun: Summarizing a Function of Spatial Location

Description

Prints a useful summary of a function of spatial location.

Usage

# S3 method for distfun
summary(object, …)
  # S3 method for funxy
summary(object, …)

Arguments

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.

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.

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.

See Also

distfun, funxy

Examples

# 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)
# }