Computes the deviation from population parity from a plan. Higher values indicate that (at least) a single district in the map deviates from population parity. See Details.
redist.parity(plans, total_pop) plan_parity(map, .data = cur_plans(), ...)
numeric vector with the population parity for each column
With a map with
pop representing the populations of each district,
the deviation from population parity is given as
max(abs(pop - parity) / parity)
parity = sum(pop)/length(pop) is the population size for the
Therefore, the metric can be thought of as the maximum percent deviation from
equal population. For example, a value of 0.03 in this metric indicates that
all districts are within 3 percent of population parity.