Simulates Strauss Spatial Point Process

DESCRIPTION:

Simulates Strauss spatial point process.

USAGE:

Strauss(n, c=0, r)

REQUIRED ARGUMENTS:

n
number of points
c
parameter c in [0, 1]. c = 0 corresponds to complete inhibition at distances up to r.
r
inhibition distance

VALUE:

list of vectors of x and y coordinates

SIDE EFFECTS:

uses the random number generator

DETAILS:

Uses spatial birth-and-death process for 4 n steps, or for 40 n steps starting from a binomial pattern on the first call from an other function. Uses the region set by ppinit or ppregion.

SEE ALSO:

,

EXAMPLES:

towns <- ppinit("towns.dat")
par(pty="s")
plot(Kfn(towns, 10), type="b", xlab="distance", ylab="L(t)")
lines(Kaver(10, 25, Strauss(69,0.5,3.5)))