Plot Weighted Border Adjacency

Plots the weighted adjacency graph by how often precincts coocur. If an argument to counties is provided, it subsets the edges to plot to those that cross over the county boundary.

Usage

redist.plot.wted.adj(
  shp,
  plans,
  counties = NULL,
  ref = TRUE,
  adj = NULL,
  plot_shp = TRUE
)

Arguments

shp

A SpatialPolygonsDataFrame, sf object, or redist_map. Required.

plans

A redist_plans object or matrix of redistricting plans, where each column indicates a plan and each

counties

unquoted name of a column in shp or a vector of county assignments. Subsets to edges which cross this boundary if supplied.

ref

Plot reference map? Defaults to TRUE which gets the existing plan from

adj

A zero-indexed adjacency list. Extracted from shp if shp is a redist_map. Otherwise created with redist.adjacency if not supplied. Default is NULL.

plot_shp

Should the shapes be plotted? Default is TRUE.

Value

ggplot

Examples

data(iowa)
shp <- redist_map(iowa, existing_plan = cd_2010, pop_tol = 0.01)
plans <- redist_smc(shp, 100)
#> SEQUENTIAL MONTE CARLO
#> Sampling 100 99-unit maps with 4 districts and population between 753973 and 769205.
#> Split [0/3] ■                                | ETA?
#> Split [2/3] ■■■■■■■■■■■■■■■■■■■■■            | ETA 0s
#> Split [3/3] ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■  | ETA 0s
#> 
redist.plot.wted.adj(shp, plans = plans, counties = region)
#> Warning: Use of `nb$wt` is discouraged.
#> ℹ Use `wt` instead.