as.ppm
Extract Fitted Point Process Model
Extracts the fitted point process model from some kind of fitted model.
Usage
as.ppm(object)## S3 method for class 'ppm':
as.ppm(object)
## S3 method for class 'profilepl':
as.ppm(object)
## S3 method for class 'kppm':
as.ppm(object)
Arguments
- object
- An object that includes a
fitted Poisson or Gibbs point process model.
An object of class
"ppm"
,"profilepl"
or"kppm"
or possibly other classes.
Details
The function as.ppm
extracts
the fitted point process model (of class "ppm"
)
from a suitable object.
The function as.ppm
is generic, with methods for the classes
"ppm"
, "profilepl"
and "kppm"
,
and possibly for other classes.
For the class "profilepl"
of models fitted by maximum profile
pseudolikelihood, the method as.ppm.profilepl
extracts the
fitted point process model (with the optimal values of the
irregular parameters).
For the class "kppm"
of models fitted by minimum contrast
using Waagepetersen's two-step estimation procedure
(see kppm
), the method as.ppm.kppm
extracts the Poisson point process model that is fitted in the
first stage of the procedure.
Value
- An object of class
"ppm"
.
See Also
Examples
# fit a model by profile maximum pseudolikelihood
rvals <- data.frame(r=(1:10)/100)
pfit <- profilepl(rvals, Strauss, cells, ~1)
# extract the fitted model
fit <- as.ppm(pfit)