spatstat (version 1.39-0)

fardist: Farthest Distance to Boundary of Window

Description

Computes the farthest distance from each pixel, or each data point, to the boundary of the window.

Usage

fardist(X, ...)
  ## S3 method for class 'owin':
fardist(X, \dots, squared=FALSE)
  ## S3 method for class 'ppp':
fardist(X, \dots, squared=FALSE)

Arguments

X

A spatial object such as a window or point pattern.

...

Arguments passed to as.mask to determine the pixel resolution, if required.

squared

Logical. If TRUE, the squared distances will be returned.

Value

• For fardist.owin, a pixel image (object of class "im").

  For fardist.ppp, a numeric vector.

Details

The function fardist is generic, with methods for the classes owin and ppp.

For a window W, the command fardist(W) returns a pixel image in which the value at each pixel is the largest distance from that pixel to the boundary of W.

For a point pattern X, with window W, the command fardist(X) returns a numeric vector with one entry for each point of X, giving the largest distance from that data point to the boundary of W.

Examples

fardist(cells)

  plot(FR <- fardist(letterR))