is.marked: Test Whether Marks Are Present

In spatstat.geom: Geometrical Functionality of the 'spatstat' Family

Test Whether Marks Are Present

Description

Generic function to test whether a given object (usually a point pattern or something related to a point pattern) has “marks” attached to the points.

Usage

  is.marked(X, ...) 

Arguments

X	Object to be inspected
...	Other arguments.

Details

“Marks” are observations attached to each point of a point pattern. For example the longleaf dataset contains the locations of trees, each tree being marked by its diameter; the amacrine dataset gives the locations of cells of two types (on/off) and the type of cell may be regarded as a mark attached to the location of the cell.

Other objects related to point patterns, such as point process models, may involve marked points.

This function tests whether the object X contains or involves marked points. It is generic; methods are provided for point patterns (objects of class "ppp") and point process models (objects of class "ppm").

Value

Logical value, equal to TRUE if X is marked.

Author(s)

\adrian

and \rolf

See Also

is.marked.ppp, is.marked.ppm

spatstat.geom documentation built on Sept. 18, 2024, 9:08 a.m.