comp_polsby {redistmetrics} | R Documentation |
Calculate Polsby Popper Compactness
Description
Calculate Polsby Popper Compactness
Usage
comp_polsby(
plans,
shp,
use_Rcpp,
perim_path,
perim_df,
epsg = 3857,
ncores = 1
)
Arguments
plans |
A |
shp |
A |
use_Rcpp |
If |
perim_path |
Path to perimeter tibble saved by |
perim_df |
Tibble of perimeters from |
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
Cox, E. 1927. A Method of Assigning Numerical and Percentage Values to the Degree of Roundness of Sand Grains. Journal of Paleontology, 1(3), 179-183.
Polsby, Daniel D., and Robert D. Popper. 1991. “The Third Criterion: Compactness as a procedural safeguard against partisan gerrymandering.” Yale Law & Policy Review 9 (2): 301–353.
Examples
data(nh)
data(nh_m)
# For a single plan:
comp_polsby(plans = nh$r_2020, shp = nh)
# Or many plans:
comp_polsby(plans = nh_m[, 3:5], shp = nh)