rSSI

0th

Percentile

Simulate Simple Sequential Inhibition

Generate a random point pattern, a realisation of the Simple Sequential Inhibition (SSI) process.

Keywords
spatial, datagen
Usage
rSSI(r, n, win = owin(c(0,1),c(0,1)), giveup = 1000, x.init=NULL)
Arguments
r
Inhibition distance.
n
Number of points to generate.
win
Window in which to simulate the pattern. An object of class "owin" or something acceptable to as.owin.
giveup
Number of rejected proposals after which the algorithm should terminate.
x.init
Optional. Initial configuration of points. A point pattern (object of class "ppp").
Details

This algorithm generates a realisation of the Simple Sequential Inhibition point process inside the window win.

Starting with an empty window (or with the point pattern x.init if specified), the algorithm adds points one-by-one. Each new point is generated uniformly in the window and independently of preceding points. If the new point lies closer than r units from an existing point, then it is rejected and another random point is generated.

The algorithm terminates either when the desired number n of points is reached, or when the current point configuration has not changed for giveup iterations.

Value

  • The simulated point pattern (an object of class "ppp").

See Also

rpoispp, rMaternI, rMaternII.

Aliases
  • rSSI
Examples
pp <- rSSI(0.05, 200)
 plot(pp)
Documentation reproduced from package spatstat, version 1.23-3, License: GPL (>= 2)

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