Divisor methods

Source: R/divisor.R

Functions to directly apply divisor apportionment methods instead of calling proporz() with a method parameter.

divisor_round(votes, n_seats, quorum = 0)

divisor_floor(votes, n_seats, quorum = 0)

divisor_harmonic(votes, n_seats, quorum = 0)

divisor_geometric(votes, n_seats, quorum = 0)

divisor_ceiling(votes, n_seats, quorum = 0)

Arguments

votes

numeric vector with number of votes for each party

n_seats

total number of seats

quorum

Vote threshold a party must reach. Used as quota of total votes within a district if less than 1 otherwise as number of votes.

Value

The number of seats per party as a vector

Details

Divisor methods are known under different names:

  • d'hondt, jefferson, hagenbach-bischoff: use divisor_floor()

  • sainte-lague, webster: use divisor_round()

  • adams: use divisor_ceiling()

  • dean: use divisor_harmonic()

  • huntington-hill, hill-huntington: use divisor_geometric()

All divisor functions call highest_averages_method() with a different sequence of divisors.

See also

proporz()

Examples

votes = c("Party A" = 690, "Party B" = 400,
          "Party C" = 250, "Party D" = 120)

divisor_round(votes, 10)
#> Party A Party B Party C Party D 
#>       4       3       2       1 

divisor_floor(votes, 10)
#> Party A Party B Party C Party D 
#>       5       3       2       0 

divisor_ceiling(votes, 10)
#> Party A Party B Party C Party D 
#>       4       3       2       1 

divisor_ceiling(votes, 5)
#> Party A Party B Party C Party D 
#>       2       1       1       1 

divisor_geometric(votes, 10, quorum = 0.05)
#> Party A Party B Party C Party D 
#>       4       3       2       1 

divisor_harmonic(votes, 10)
#> Party A Party B Party C Party D 
#>       4       3       2       1