spatstat.geom (version 3.2-8)

spatdim: Spatial Dimension of a Dataset

Description

Extracts the spatial dimension of an object in the spatstat package.

Usage

spatdim(X, intrinsic=FALSE)

Value

An integer, or NA.

Arguments

X

Object belonging to any class defined in the spatstat package.

intrinsic

Logical value indicating whether to return the number of intrinsic dimensions. See Details.

Author

Adrian Baddeley , Rolf Turner and Ege Rubak .

Details

This function returns the number of spatial coordinate dimensions of the dataset X. The results for some of the more common types of objects are as follows:

object class	dimension
"ppp"	2
"lpp"	2
"pp3"	3
"ppx"	number of spatial dimensions
"owin"	2
"psp"	2
"ppm"	2

Note that time dimensions are not counted.

Some spatial objects are lower-dimensional subsets of the space in which they live. This lower number of dimensions is returned if intrinsic=TRUE. For example, a dataset on a linear network (an object X of class "linnet", "lpp", "linim", "linfun" or "lintess") returns spatdim(X) = 2 but spatdim(X, intrinsic=TRUE) = 1.

If X is not a recognised spatial object, the result is NA.

Examples

  spatdim(lansing)
  A <- osteo$pts[[1]]
  spatdim(A)
  spatdim(domain(A))