Calculate Reock Compactness

Calculate Reock Compactness

comp_reock(plans, shp, epsg = 3857, ncores = 1)

Arguments

plans

A redist_plans object or plans_matrix where each row indicates a district assignment and each column is a plan.

shp

A redist_map object, tibble, or data frame with an sf geometry column.

epsg

Numeric EPSG code to use to project the shapefile, if needed. Default is 3857.

ncores

Integer number of cores to use. Default is 1.

Value

A numeric vector. Can be shaped into a district-by-plan matrix.

References

Reock, E. 1961. A Note: Measuring Compactness as a Requirement of Legislative Apportionment. Midwest Journal of Political Science, 5(1), 70-74.

Examples

data(nh)
data(nh_m)
# For a single plan:
comp_reock(plans = nh$r_2020, shp = nh)
#> [1] 0.4444653 0.2502152

# Or many plans:
comp_reock(plans = nh_m[, 3:5], shp = nh)
#> [1] 0.2787073 0.4989468 0.4731140 0.2469171 0.5380798 0.2560460