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redist (version 3.1.5)

Simulation Methods for Legislative Redistricting

Description

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 methods described in Fifield, Higgins, Imai and Tarr (2020) , Fifield, Imai, Kawahara, and Kenny (2020) , and McCartan and Imai (2020) .

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Version

Install

install.packages('redist')

Monthly Downloads

363

Version

3.1.5

License

GPL (>= 2)

Maintainer

Christopher T. Kenny

Last Published

October 5th, 2021

Functions in redist (3.1.5)

Florida 70 Precinct Shape File

Add a reference plan to a set of plans

Florida 250 Precinct Shape File

Florida 25 Precinct File

Florida 25 Precinct Shape File

Hierarchically classify a set of redistricting plans

flip_constraints_helper

Flip Constraints Helper

All Partitions of 25 Precincts into 3 Congressional Districts (No Population Constraint)

as.matrix.redist

Extract the redistricting matrix from a redist object

Make a comparison between two sets of plans

get_plans_weights

Extract the sampling weights from a redistricting simulation.

Extract the existing district assignment from a redist_map object

plot.redist_classified

Plot a plan classification

rbind.redist_plans

Combine multiple sets of redistricting plans

Get and set the adjacency graph from a redist_map object

plans_diversity

Calculate the diversity of a set of plans

Pull back plans to unmerged units

Check that a redist_map object is contiguous

Iowa County File

Confidence Intervals for Importance Sampling Estimates

Get and set the population tolerance from a redist_map object

competitiveness

Compute Competitiveness

print.redist_map

Generic to print redist_map

print.redist_plans

Print method for redist_plans

is_county_split

Identify which counties are split by a plan

redist.combine.anneal

redist.combine.anneal

redist.enumpart

Enumerate All Parititions

redist.district.splits

Counts the Number of Counties within a District

Combine successive runs of redist.flip

get_sampling_info

Extract the sampling information from a redistricting simulation

Extract the last plan from a set of plans

Extract the target district population from a redist_map object

Renumber districts to match an existing plan

get_plans_matrix

Extract the matrix of district assignments from a redistricting simulation

get_mh_acceptance_rate

Extract the Metropolis Hastings Acceptance Rate

redist.constraint.helper

Create Constraints for SMC

Renumber districts to match a quantity of interest

Merge map units

Local Plan Optimization

redist.findparams

Run parameter testing for redist.flip

redist.find.target

Find Majority Minority Remainder

plot.redist_map

Plot a redist_map

plot.redist_plans

Summary plots for \link{redist_plans}

redist.calc.frontier.size

Calculate Frontier Size

Calculate Group Percent by District

redist.plot.majmin

Majority Minority Plots

redist.coarsen.adjacency

Coarsen Adjacency List

redist.plot.map

Freeze Parts of a Map

Reorders district numbers

distr_compactness

Calculate compactness measures for a set of plans

redist.combine.mpi

Combine successive runs of redist.mcmc.mpi

print.redist_classified

Print redist_classified objects

Print legacy redist objects

redist.dist.pop.overlap

Compare the Population Overlap Across Plans at the District Level

redist.multisplits

Counts the Number of Counties Split Between 3 or More Districts

redist.plot.hist

Plot a histogram of a summary statistic

partisan_metrics

Calculate gerrymandering metrics for a set of plans

prec_assignment

Extract the district assignments for a precinct across all simulated plans

redist.read.enumpart

Read Results from enumpart

redist.reduce.adjacency

Reduce Adjacency List

redist.plot.interactive

Display an interactive map

redist.county.relabel

Relabel Discontinuous Counties

prec_cooccurrence

Compute a matrix of precinct co-occurrences

redist.county.id

Create County IDs

redist.smc_is_ci

Confidence Intervals for Importance Sampling Estimates

redist.sink.plan

Sink Plans to 1:ndists

Subset to sampled or reference draws

Create a redist_map object.

Compute Distance between Partitions

Inverse probability reweighting for MCMC Redistricting

redist.mcmc.mpi

MCMC Redistricting Simulator using MPI

Calculates Maximum Deviation from Population Parity

Redistricting via Random Seed and Grow Algorithm

redist.uncoarsen

Uncoarsen a District Matrix

SMC Redistricting Sampler

Objects exported from other packages

'Flip' Markov Chain Monte Carlo Redistricting Simulation

Pick One Plan from Many Plans

Simulation Methods for Legislative Redistricting

Scoring function arithmetic

redist_mergesplit

Merge-Split/Recombination MCMC Redistricting Sampler

redist.plot.adj

Creates a Graph Overlay

redist.init.enumpart

Initialize enumpart

redist.plot.plans

Plot a district assignment

redist.plot.penalty

Visualize VRA Penalty

redist.prep.polsbypopper

Prep Polsby Popper Perimeter Dataframe

Identify Cores of a District (Heuristic)

scorer_group_pct

Scoring functions for redist_shortburst

redist.adjacency

Adjacency List functionality for redist

redist.random.subgraph

Return a random subgraph of a shape

Redistricting via Compact Random Seed and Grow Algorithm

redist.diagplot

Diagnostic plotting functionality for MCMC redistricting.

Count County Splits

redist.plot.varinfo

Static Variation of Information Plot

segregation_index

Segregation index calculation for MCMC redistricting.

redist.run.enumpart

Runs the enumpart algorithm

redist.plot.scatter

Scatter plot of plan summary statistics

redist_quantile_trunc

Helper function to truncate importance weights

redist_shortburst

Redistricting Optimization through Short Bursts

redist.plot.distr_qtys

Plot quantities by district

redist.flip.anneal

Flip MCMC Redistricting Simulator using Simulated Annealing

Flip MCMC Redistricting Simulator

redist.plot.cores

redist.prec.pop.overlap

Compare the Population Overlap Across Plans at the Precinct Level

redist_mergesplit_parallel

Parallel Merge-Split/Recombination MCMC Redistricting Sampler

A set of redistricting plans

redist.prep.enumpart

Prepares a run of the enumpart algorithm by ordering edges