Pairwise counting: Difference between revisions

[[File:Pairwise counting procedure.png|thumb|The procedure for pairwise counting with various ballot formats and examples.]]If using pairwise counting for a [[Rated method|rated method]], one helpful trick is to put the rated information for each candidate in the cell where each candidate is compared to themselves. For example, if A has 50 points (based on a [[Score voting]] ballot), B has 35 points, and C has 20, then this can be represented as:

{| class="wikitable"

|+

!

!A

!B

!C

|-

|A

|'''50'''

|A>B

|A>C

|-

|B

|B>A

|'''35'''

|B>C

|-

|C

|C>A

|C>B

|'''20'''

|}

This reduces the amount of space required to store and demonstrate all of the relevant information for calculating the result of the voting method.

When looking at two candidates, a quick way to figure out the number of votes for the first candidate>second candidate and vice versa is to first locate the cell for "first candidate>second candidate", count the minimum number of cells diagonally one must go to be adjacent to the middle dividing line of the matrix (where there is a --- cell), and then going one cell further diagonally (meaning you'll be starting from the closest cell on the opposite side of that dividing line), go that number of cells further diagonally to reach the other cell. For example: