frontier_as_sf: Convert frontier_model object into an sf object

In MengLeZhang/socialFrontiers: What the Package Does (One Line, Title Case)

Convert frontier_model object into an sf object

Description

Converts a frontier_model created by frontier_detect into an sf line object. Default geometry are lines.

Usage

frontier_as_sf(
  frontier_model,
  convert2Line = T,
  non_frontiers = F,
  edgelistOnly = F,
  silent = F
)

Arguments

frontier_model	A object of calls frontier_model created by frontier_detect
convert2Line	Boolean value indicating if we want to return borders as line geometries. If FALSE then it will return all types of geometries created by the st_intersects function used by the routine (see details). This includes points.
non_frontiers	Boolean value indicating if non-frontier borders are also returned. Default FALSE to speed up processing (see details).
edgelistOnly	Boolean value indicating where or not to extract edgelist only without sf geometry. Default FALSE to return sf geometry.
silent	Boolean. To print progress or not. Default FALSE

Details

This is strictly for 1) graphing purposes or 2) for spatial operations Recommended to use edgelists for statistical analysis (wip)

Implementation basically requires us to: 1) Make an edge list of all bordering polygons with an indicator frontier if they are a frontier (and include phi from the binomial inla) 2) From that edge list use st_intersect to extract ALL borders Issue current method uses do.call(rbind) which is inefficient as number of list items grows Original code: frontier creation source line 80+ onwards

MengLeZhang/socialFrontiers documentation built on May 18, 2024, 9:36 a.m.