R: Interaction Structure Family Objects

isf.object {spatstat.core} | R Documentation

## Interaction Structure Family Objects

### Description

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.

### Details

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.

### Value

An object of class `"isf"`, essentially a list of functions for various tasks.

The internal format is undocumented and may be changed without notice.

### Author(s)

Adrian Baddeley Adrian.Baddeley@curtin.edu.au.

[Package spatstat.core version 2.4-4 Index]