Make a fully connected graph for INLA

This function converts a graph with islands into a fully connected graph by searching for the nearest area between the different nodes and connecting them, with the possibility of setting a threshold for connecting several areas if they are within the limits.

Usage

inla.full.graph(
  sp_obj,
  graph,
  thresh = 0.1,
  snap = 5e-07,
  distance_by = c("perimeter", "centroid")
)

Arguments

sp_obj

Spatial object in sp form

graph

Graph object from nb2INLA function

snap

Snap argument for the function poly2nb

distance_by

Choices are perimeter and centroid

Value

List including three different objects: the adjacency object, the edited graph and a dataframe with the changes applied