adjacency_matrix {stcos}

Sparse adjacency matrix between two sets of areas.

Description

A convenience function to convert output from sf::st_touches to a sparse matrix as defined in the Matrix package.

Usage

adjacency_matrix(dom)

Arguments

dom

An sf object representing a domain of areal units.

Details

Returns a matrix A whose (i,j)th entry contains a 1 if areal units dom[i,] and dom[j,] are adjacent; 0 otherwise.

Value

An adjacency matrix

Examples

data("acs_sf")
dom = acs5_2013[1:4,]
A = adjacency_matrix(dom)