Calculate Tau Gap
part_tau_gap(plans, shp, dvote, rvote, tau = 1)A redist_plans object or plans_matrix where each row indicates a district assignment and each column is a plan.
A redist_map object, tibble, or data frame containing other columns.
Unqouted name of column in shp with total population.
Unqouted name of column in shp with group population.
A non-negative numeric for calculating Tau Gap. Defaults to 1.
A numeric vector. Can be shaped into a district-by-plan matrix.
Gregory S. Warrington. 2018. "Quantifying Gerrymandering Using the Vote Distribution." Election Law Journal: Rules, Politics, and Policy. Pp. 39-57.http://doi.org/10.1089/elj.2017.0447
data(nh)
data(nh_m)
# For a single plan:
part_tau_gap(plans = nh$r_2020, shp = nh, rvote = nrv, dvote = ndv)
#> [1] -0.009275831 -0.009275831
# Or many plans:
part_tau_gap(plans = nh_m[, 3:5], shp = nh, rvote = nrv, dvote = ndv)
#> [1] -0.005446170 -0.005446170 -0.004345037 -0.004345037 -0.004733761
#> [6] -0.004733761