incircle

0th

Percentile

Find Largest Circle Inside Window

Find the largest circle contained in a given window.

Keywords
spatial, math
Usage
incircle(W)

inradius(W)

Arguments
W

A window (object of class "owin").

Details

Given a window W of any type and shape, the function incircle determines the largest circle that is contained inside W, while inradius computes its radius only.

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.

Value

The result of incircle is a list with entries x,y,r giving the location (x,y) and radius r of the incircle.

The result of inradius is the numerical value of radius.

See Also

centroid.owin

Aliases
  • incircle
  • inradius
Examples
# NOT RUN {
  W <- square(1)
  Wc <- incircle(W)
  plot(W)
  plot(disc(Wc$r, c(Wc$x, Wc$y)), add=TRUE)

  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)
# }
Documentation reproduced from package spatstat, version 1.61-0, License: GPL (>= 2)

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