Skip to contents

Create Block Contiguity for Spatial Regimes

Source: R/nb-block-contiguity.R
st_block_nb.Rd

libpysal write that "block contiguity structures are relevant when defining neighbor relations based on membership in a regime. For example, all counties belonging to the same state could be defined as neighbors, in an analysis of all counties in the US."

Source: libpysal

Usage

st_block_nb(regime, id = 1:length(regime), diag = FALSE)

Arguments

regime

a column identifying which spatial regime each element of id belongs

id

a column identifying unique observations

diag

default FALSE. If TRUE, includes diagonal element / the self.

Value

An object of class nb. When diag = TRUE the attribute self.included = TRUE.

Examples

id <- guerry$code_dept
regime <- guerry$region
st_block_nb(regime, id)
#> Neighbour list object:
#> Number of regions: 85 
#> Number of nonzero links: 1360 
#> Percentage nonzero weights: 18.82353 
#> Average number of links: 16 
#> 5 disjoint connected subgraphs