Compute Global Geary's C

Source: R/geary.R

Computes the Global Geary's Contiguity statistic. Can produce spatial weights from an adjacency or sf data frame, in which case the spatial_mat is a contiguity matrix. Users can also provide a spatial_mat argument directly.

global_gearys(shp, adj, wts, spatial_mat, epsg = 3857)

Arguments

shp

sf data frame. Optional if adj or spatial_mat provided.

adj

zero indexed adjacency list. Optional if shp or spatial_mat provided.

wts

Required. Numeric vector with weights to use for Moran's I.

spatial_mat

matrix of spatial weights. Optional if shp or adj provided.

epsg

numeric EPSG code to planarize to. Default is 3857.

Value

double

Examples

library(dplyr)
data('checkerboard')
checkerboard <- checkerboard |> mutate(m = as.numeric((id + i) %% 2 == 0))
global_gearys(shp = checkerboard, wts = checkerboard$m)
#> Warning: Planarizing skipped. `x` missing CRS.
#> [1] 1.96875