Example proximity matrix

A 42 by 42 row-standardized spatial weight matrix for the 42 areas in mys: each area is linked to its 4 nearest areas by centroid distance (sim_area$x_coord, sim_area$y_coord), a link in either direction counts, and each row is divided by its number of neighbours (4 to 8). The weights suit the SAR models (eblup_sfh, eblup_stfh, hb_area(spatial = "slm")), and the pattern W > 0 is the neighbourhood graph the CAR models of hb_area use ("besag", "bym", "bym2", "leroux"). Until fastsae 1.0.0 it was a dense distance-decay matrix that linked every pair of areas, which a CAR model reads as a complete graph.

Usage

mys_proxmat

Format

A square numeric matrix with 42 rows and 42 columns with values between 0 and 1; every row sums to 1.

Source

Built from the sim_area centroids by data-raw/mys_proxmat.R in the package sources.

Examples

data(mys_proxmat)
range(rowSums(mys_proxmat))
#> [1] 1 1
# neighbours per area (the graph used by the CAR models)
table(rowSums(mys_proxmat > 0))
#> 
#>  4  5  6  7  8 
#> 19 15  4  3  1