redist.plot.wted.adj

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.

Enables researchers to sample redistricting plans from a pre-specified
target distribution using Sequential Monte Carlo and Markov Chain Monte Carlo
algorithms. The package allows for the implementation of various constraints in
the redistricting process such as geographic compactness and population parity
requirements. Tools for analysis such as computation of various summary statistics
and plotting functionality are also included. The package implements the SMC
algorithm of McCartan and Imai (2023) <doi:10.1214/23-AOAS1763>, the enumeration
algorithm of Fifield, Imai, Kawahara, and Kenny (2020) <doi:10.1080/2330443X.2020.1791773>,
the Flip MCMC algorithm of Fifield, Higgins, Imai and Tarr (2020) <doi:10.1080/10618600.2020.1739532>,
the Merge-split/Recombination algorithms of Carter et al. (2019) <arXiv:1911.01503>
and DeFord et al. (2021) <doi:10.1162/99608f92.eb30390f>, and the Short-burst
optimization algorithm of Cannon et al. (2020) <arXiv:2011.02288>.

Christopher T. Kenny

redist

Simulation Methods for Legislative Redistricting

Cory McCartan

Ben Fifield

Kosuke Imai

Jun Kawahara

Alexander Tarr

Michael Higgins

redist.plot.wted.adj function

<dl><dt>shp</dt>
<dd>A SpatialPolygonsDataFrame, sf object, or redist_map. Required.</dd>
<dt>plans</dt>
<dd>A <code>redist_plans</code> object or matrix of redistricting plans, where each
column indicates a plan and each</dd>
<dt>counties</dt>
<dd>unquoted name of a column in <code>shp</code> or a vector of county assignments. Subsets to
edges which cross this boundary if supplied.</dd>
<dt>ref</dt>
<dd>Plot reference map? Defaults to TRUE which gets the existing plan from</dd>
<dt>adj</dt>
<dd>A zero-indexed adjacency list. Extracted from <code>shp</code> if <code>shp</code> is a <code>redist_map</code>.
Otherwise created with redist.adjacency if not supplied. Default is NULL.</dd>
<dt>plot_shp</dt>
<dd>Should the shapes be plotted? Default is TRUE.</dd></dl>

Arguments

Plot Weighted Border Adjacency — redist.plot.wted.adj

<dl>

<dt>shp</dt>
<dd>A SpatialPolygonsDataFrame, sf object, or redist_map. Required.</dd>


<dt>plans</dt>
<dd>A <code>redist_plans</code> object or matrix of redistricting plans, where each
column indicates a plan and each</dd>


<dt>counties</dt>
<dd>unquoted name of a column in <code>shp</code> or a vector of county assignments. Subsets to
edges which cross this boundary if supplied.</dd>


<dt>ref</dt>
<dd>Plot reference map? Defaults to TRUE which gets the existing plan from</dd>


<dt>adj</dt>
<dd>A zero-indexed adjacency list. Extracted from <code>shp</code> if <code>shp</code> is a <code>redist_map</code>.
Otherwise created with redist.adjacency if not supplied. Default is NULL.</dd>


<dt>plot_shp</dt>
<dd>Should the shapes be plotted? Default is TRUE.</dd>

</dl>

redist.plot.wted.adj: Plot Weighted Border Adjacency

Description

Usage

Value

Arguments

Examples