Objects of class "isf" are used internally by the
spatstat package to represent the structure
of the interpoint interactions in a family of point process models.
An object of class "isf", essentially a list of functions
for various tasks.
The internal format is undocumented and may be changed without notice.
Advanced Use Only!
An object of class "isf" (Interaction Structure Family)
is used internally by the spatstat package to
represent the common mathematical and algorithmic structure of
the interpoint interactions in a family of point process models.
The existing objects of class "isf" are:
pairwise.family |
pairwise interaction |
triplet.family |
triplet interaction |
pairsat.family |
saturated pairwise interaction |
hierpair.family |
hierarchical pairwise interaction |
inforder.family |
infinite order interaction |
hybrid.family |
hybrids of several interactions |
ord.family |
Ord interactions |
The information contained in these objects enables the spatstat package to select the appropriate algorithm for fitting, predicting and simulating each point process model.
For example, in order to fit a model that involves pairwise
interactions, the model-fitting function ppm would use
information contained in pairwise.family to select the
appropriate algorithms.
An object of class "isf" is essentially a list of functions
for various tasks.
The internal format is undocumented and may be changed
without notice.