prec_cooccurrence

For a map with <code>n</code> precincts Returns an <code>n</code>-by-<code>n</code> matrix, where each
entry measures the fraction of the plans in which the row and column
precincts were in the same district.

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

prec_cooccurrence function

<dl><dt>plans</dt>
<dd>a redist_plans object.</dd>
<dt>which</dt>
<dd><code><a href="https://dplyr.tidyverse.org/reference/dplyr_data_masking.html">&lt;data-masking&gt;</a></code> which plans to
compute the co-occurrence over. Defaults to all.</dd>
<dt>sampled_only</dt>
<dd>if <code>TRUE</code>, do not include reference plans.</dd>
<dt>ncores</dt>
<dd>the number of parallel cores to use in the computation.</dd></dl>

Arguments

Compute a matrix of precinct co-occurrences — prec_cooccurrence

<dl>

<dt>plans</dt>
<dd>a redist_plans object.</dd>


<dt>which</dt>
<dd><code><a href='https://dplyr.tidyverse.org/reference/dplyr_data_masking.html'>&lt;data-masking&gt;</a></code> which plans to
compute the co-occurrence over. Defaults to all.</dd>


<dt>sampled_only</dt>
<dd>if <code>TRUE</code>, do not include reference plans.</dd>


<dt>ncores</dt>
<dd>the number of parallel cores to use in the computation.</dd>

</dl>

prec_cooccurrence: Compute a matrix of precinct co-occurrences

Description

Usage

Value

Arguments