contig: A function to compute the contiguity matrix

In OasisR: Outright Tool for the Analysis of Spatial Inequalities and Segregation

A function to compute the contiguity matrix

Description

The function is based on sf package and can be used with a shape file or an R spatial object (class sf, sfc or sfg).

Usage

contig(spatobj = NULL, folder = NULL, shape = NULL, queen = FALSE)

Arguments

spatobj	- a spatial object (class sf, sfc or sfg) containing geographic information
folder	- a character vector with the folder (directory) name indicating where the shapefile with the geographic information is located.
shape	- a character vector with the name of the shapefile (without the .shp extension) which contains the geographic information
queen	= TRUE for queen criteria, FALSE (by default) for rook criteria

Value

A first order contiguity (adjacency) matrix, where each element [i,j] equals 1 if i-th and j-th spatial units are adjacent, 0 otherwise (queen or rook criteria)

See Also

Other spatial functions used for segregation indices computation: area, perimeter, distance, distcenter, boundaries

Examples

 contig(segdata) 
foldername <- system.file('extdata', package = 'OasisR')
shapename <- 'segdata'
contig(folder = foldername, shape = shapename)

OasisR documentation built on Aug. 30, 2023, 1:09 a.m.