approval_method {votesys}

Approval Method

Description

In approval method, each voter is required to mention one or more candidates, and the winner is the one who gets the top frequency. For this function, a ballot with candidates more than required and different scores is also valid. For a score matrix, the function will check the positions j, k...which have the lowest scores (in a vote object, the lower, the better) in the ith row. However, the function will first check the approval_able element of the vote object. If it is FALSE, the winner will be NULL.

Usage

approval_method(x, min_valid = 1, n)

Arguments

x

an object of class vote.

min_valid

default is 1. If the number of valid entries of a ballot is less than this value, the ballot will not be used.

n

the number of candidates written down by a voter should not larger than this value.

Value

a list object.

• (1) call the function call.

• (2) method the counting method.

• (3) candidate candidate names.

• (4) candidate_num number of candidate.

• (5) ballot_num number of ballots in x.

• (6) valid_ballot_num number of ballots that are used to compute the result.

• (7) winner the winners, may be one, more than one or NULL.

• (8) n equal to the argument n.

• (9) other_info frequencies of candidates mentioned by voters.

Examples

raw <- matrix(NA, nrow = 22, ncol = 5)
for (i in 1: 20){
   set.seed(i)
   raw[i, ] <- sample(c(1: 5, NA, NA, NA), 5)
}
raw[21, ] <- c(4, 5, 3, 1, 2)
raw[22, ] <- c(3, 5, 1, 2, 4)
vote <- create_vote(raw, xtype = 1)
y <- approval_method(vote, n = 3)
y <- approval_method(vote, n = 3, min_valid = 5)
y <- approval_method(vote, n = 4, min_valid = 3)