update.kppm {spatstat} | R Documentation |
update
method for class "kppm"
.
## S3 method for class 'kppm' update(object, trend = ~1, ..., clusters = NULL)
object |
Fitted cluster point process model.
An object of class |
trend |
A formula without a left hand side, determining the form of the intensity of the model. |
... |
Other arguments passed to |
clusters |
The type of cluster mechanism. A character string.
See |
object
should be a fitted cluster point process model,
obtained from the model-fitting function kppm
.
The model will be updated according to the new arguments provided.
The argument trend
determines the formula for the intensity
in the model. It should be an R formula without a left hand side.
It may include the symbols .
and +
or -
to
specify addition or deletion of terms in the current model formula,
as shown in the Examples below.
The model is refitted using kppm
.
Another fitted cluster point process model (object of
class "kppm"
.
Adrian Baddeley Adrian.Baddeley@csiro.au http://www.maths.uwa.edu.au/~adrian/ and Rolf Turner r.turner@auckland.ac.nz
kppm
, plot.kppm
,
predict.kppm
, simulate.kppm
,
methods.kppm
,
vcov.kppm
data(redwood) fit <- kppm(redwood, ~1, "Thomas") fitx <- update(fit, ~ . + x) fitM <- update(fit, clusters="MatClust")