
Calculates Maximum Deviation from Population Parity
Source:R/parity.R
, R/plans_helpers.R
redist.parity.Rd
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.
Usage
redist.parity(plans, total_pop)
plan_parity(map, .data = pl(), ...)
Arguments
- plans
A matrix with one row for each precinct and one column for each map. Required.
- total_pop
A numeric vector with the population for every precinct.
- map
a
redist_map
object- .data
a
redist_plans
object- ...
passed on to
redist.parity
Details
With a map with pop
representing the populations of each district,
the deviation from population parity is given as max(abs(pop - parity) / parity)
where parity = sum(pop)/length(pop)
is the population size for the
average district.
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.