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Daniel Tartavel
2022-09-21 14:01:45 +02:00
parent 0a30f39eb4
commit cfee4d93d0
349 changed files with 4 additions and 4 deletions
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include/condorcet/src/Algo/Tools/PairwiseStats.php Normal file
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<?php
/*
Condorcet PHP - Election manager and results calculator.
Designed for the Condorcet method. Integrating a large number of algorithms extending Condorcet. Expandable for all types of voting systems.
By Julien Boudry and contributors - MIT LICENSE (Please read LICENSE.txt)
https://github.com/julien-boudry/Condorcet
*/
declare(strict_types=1);
/////////// TOOLS FOR MODULAR ALGORITHMS ///////////
namespace CondorcetPHP\Condorcet\Algo\Tools;
use CondorcetPHP\Condorcet\Algo\Pairwise;
// Generic for Algorithms
abstract class PairwiseStats
{
public static function PairwiseComparison(Pairwise $pairwise): array
{
$comparison = [];
foreach ($pairwise as $candidate_key => $candidate_data) {
$comparison[$candidate_key]['win'] = 0;
$comparison[$candidate_key]['null'] = 0;
$comparison[$candidate_key]['lose'] = 0;
$comparison[$candidate_key]['balance'] = 0;
$comparison[$candidate_key]['sum_defeat_margin'] = 0;
$comparison[$candidate_key]['worst_pairwise_defeat_winning'] = 0;
$comparison[$candidate_key]['worst_pairwise_defeat_margin'] = null;
$comparison[$candidate_key]['worst_pairwise_opposition'] = 0;
foreach ($candidate_data['win'] as $opponentKey => $opponentLose) {
$defeat_margin = $candidate_data['lose'][$opponentKey] - $opponentLose;
// Worst margin defeat
if ($comparison[$candidate_key]['worst_pairwise_defeat_margin'] === null || $comparison[$candidate_key]['worst_pairwise_defeat_margin'] < $defeat_margin) {
$comparison[$candidate_key]['worst_pairwise_defeat_margin'] = $defeat_margin;
}
// Worst pairwise opposition
if ($comparison[$candidate_key]['worst_pairwise_opposition'] < $candidate_data['lose'][$opponentKey]) {
$comparison[$candidate_key]['worst_pairwise_opposition'] = $candidate_data['lose'][$opponentKey];
}
// for each Win, null, Lose
if ($opponentLose > $candidate_data['lose'][$opponentKey]) {
$comparison[$candidate_key]['win']++;
$comparison[$candidate_key]['balance']++;
} elseif ($opponentLose === $candidate_data['lose'][$opponentKey]) {
$comparison[$candidate_key]['null']++;
} else {
$comparison[$candidate_key]['lose']++;
$comparison[$candidate_key]['balance']--;
$comparison[$candidate_key]['sum_defeat_margin'] += $defeat_margin;
// Worst winning defeat
if ($comparison[$candidate_key]['worst_pairwise_defeat_winning'] < $candidate_data['lose'][$opponentKey]) {
$comparison[$candidate_key]['worst_pairwise_defeat_winning'] = $candidate_data['lose'][$opponentKey];
}
}
}
}
return $comparison;
}
}