rMaternII
Simulate Matern Model II
Generate a random point pattern, a simulated realisation of the Mat'ern Model II inhibition process.
Usage
rMaternII(kappa, r, win = owin(c(0,1),c(0,1)))Arguments
- kappa
- Intensity of the Poisson process of proposal points. A single positive number.
- r
- Inhibition distance.
- win
- Window in which to simulate the pattern.
An object of class
"owin"or something acceptable toas.owin.
Details
This algorithm generates a realisation of Mat'ern's Model II
inhibition process
inside the window win.
The process is constructed by first
generating a uniform Poisson point process of ``proposal'' points
with intensity kappa inside the window.
Then each proposal point is marked by an ``arrival time'', a number
uniformly distributed in $[0,1]$ independently of other variables.
A proposal point is deleted if it lies within r units' distance
of another proposal point that has an earlier arrival time.
Otherwise it is retained.
The retained points constitute Mat'ern's Model II.
The difference between Mat'ern's Model I and II is the italicised statement above. Model II has a higher intensity for the same parameter values.
Value
- The simulated point pattern (an object of class
"ppp").
See Also
Examples
pp <- rMaternII(20, 0.05)