distmap

From spatstat v1.19-2 by Adrian Baddeley

Distance Map

Compute the distance map of an object, and return it as a pixel image. Generic.

Keywords: spatial, math

Usage

distmap(X, ...)

Arguments

X: Any suitable dataset representing a two-dimensional object, such as a point pattern (object of class "ppp"), a window (object of class "owin") or a line segment pattern (object of class "psp").
...: Arguments passed to as.mask to control pixel resolution.

Details

The distance map of a set of points $A$ is the function $f$ whose value f(x) is defined for any two-dimensional location $x$ as the shortest distance from $x$ to $A$.

This function computes the distance map of the set X and returns the distance map as a pixel image. This is generic. Methods are provided for point patterns (distmap.ppp), line segment patterns (distmap.psp) and windows (distmap.owin).

Value

A pixel image (object of class "im") whose grey scale values are the values of the distance map.

Examples

data(cells)
  U <- distmap(cells)
  data(letterR)
  V <- distmap(letterR)
  plot(U)
  plot(V)

Documentation reproduced from package spatstat, version 1.19-2, License: GPL (>= 2)

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