Instant-runoff voting (IRV) method is also
called alternative voting,
transferable voting, ranked-choice voting,
single-seat ranked-choice voting, or preferential voting.
In the 1st round, the candidate with absolute majority (that
is, with more than 50 percent) wins. If no absolute winner exists,
the one who gets the least votes is deleted, all other
candidates enter into the 2nd round. Again, if no
absolute winner exists, let the one with the least votes go and
start the 3rd round... Finally, an absolute winner will
appear. Ties are solved with different methods in reality; however,
this function applies the following rules: (a) if more than
one candidate gets the least votes, let all of them go; (b) if
all the candidates get the same number of votes in a certain round,
then all of them are winners. Note: the function accepts
object of class
vote and the method can only be
used when x$approval_able is TRUE, that is, there is
no duplicated values in the score matrix; otherwise,
the winner will be NULL.
irv_method(x, min_valid = 1)
an object of class
default is 1. If the number of valid entries of a ballot is less than this value, the ballot will not be used.
a list object.
call the function call.
method the counting method.
candidate candidate names.
candidate_num number of candidate.
ballot_num number of ballots in x.
valid_ballot_num number of ballots that are
used to compute the result.
winner the winners, may be NULL.
absolute whether the winner wins absolute majority in the
other_info the IRV may run for 2 or more rounds. So here
the summary information of each round is recorded. The length of the list is
equal to the number of rounds.
Reilly, B. 2004. The global spread of preferential voting: Australian institutional imperialism? Australian Journal of Political Science, 39(2), 253-266.
1 2 3 4 5 6 7
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.