comp_lw {redistmetrics}

Calculate Length Width Compactness

Description

Calculate Length Width Compactness

Usage

comp_lw(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

Harris, Curtis C. 1964. “A scientific method of districting”. Behavioral Science 3(9), 219–225.

Examples

data(nh)
data(nh_m)
# For a single plan:
comp_lw(plans = nh$r_2020, shp = nh)

# Or many plans:

# slower, beware!
comp_lw(plans = nh_m[, 3:5], shp = nh)