spatstat (version 1.23-1)

incircle: Find Largest Circle Inside Window

Description

Find the largest circle contained in a given window.

Usage

incircle(W)

Arguments

W

A window (object of class "owin").

Value

• A list with entries x,y,r giving the location (x,y) and radius r of the incircle.

Details

Given a window W of any type and shape, this function determines the largest circle that is contained inside W.

For non-rectangular windows, the incircle is computed approximately by finding the maximum of the distance map (see distmap) of the complement of the window.

See Also

centroid.owin

Examples

W <- square(1)
  Wc <- incircle(W)
  plot(W)
  plot(disc(Wc$r, c(Wc$x, Wc$y)), add=TRUE)

  data(letterR)
  plot(letterR)
  Rc <- incircle(letterR)
  plot(disc(Rc$r, c(Rc$x, Rc$y)), add=TRUE)

  W <- as.mask(letterR)
  plot(W)
  Rc <- incircle(W)
  plot(disc(Rc$r, c(Rc$x, Rc$y)), add=TRUE)