| SSI {spatial} | R Documentation |
Simulates SSI (sequential spatial inhibition) point process.
SSI(n, r)
n |
number of points |
r |
inhibition distance |
uses the region set by ppinit or ppregion.
list of vectors of x and y coordinates
uses the random number generator.
will never return if r is too large and it cannot place
n points.
Ripley, B. D. (1981) Spatial Statistics. Wiley.
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.
towns <- ppinit("towns.dat")
par(pty = "s")
plot(Kfn(towns, 10), type = "b", xlab = "distance", ylab = "L(t)")
lines(Kaver(10, 25, SSI(69, 1.2)))