616 Spatial Point Patterns: Methodology and Applications with R
Stationary Strauss process
Possible marks: 'dividing' and 'pyknotic'
Log trend:
~
marks
First order terms:
beta_dividing beta_pyknotic
262.55 91.24
Interaction distance: 0.02
Fitted interaction parameter gamma: 0.6314
The foregoing code fits the multity pe Strauss process with conditional intensity
λ
((u,m) | y) =
β
m
γ
t(u,r,y)
. (14.71)
Here
β
m
are constan ts which allow for unequ al abundance of the different species of tree. The other
quantities a re the same as in (13.12) . The interaction between two trees is assumed to be the same
for all species, and is controlled by the interaction parameter
γ
and interaction radius r = 0.02.
The interaction radius r is an ‘irregular’ parameter (see Sections