Calculate Length Width Compactness — comp_lw • redistmetrics

Calculate Length Width Compactness

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)
#> [1] 0.9161576 0.5223455

# Or many plans:
# \donttest{
# slower, beware!
comp_lw(plans = nh_m[, 3:5], shp = nh)
#> [1] 0.5620598 0.7285358 0.7656927 0.4471162 0.7839045 0.5610703
# }