function runElections()
{
$num_cands = 30;
$cands = array();
foreach (range(1, $num_cands) as $num) {
$cands[] = 'cand' . $num;
}
$pairs = getAllPairs($cands);
$result = array();
$condorcets = array();
foreach (range(0, 100000) as $j) {
$ballot_set_name = 'ballot_' . sprintf("%07d", $j);
$dir = substr($ballot_set_name, -3);
$filepath = 'sim_ballots/' . $dir . '/' . $ballot_set_name . '.json';
processBallotSet($filepath, $ballot_set_name, $pairs);
}
}
function runBallots($cands, $ballots)
{
$cprobs = array();
$final_probs = array();
$pairs = getAllPairs($cands);
foreach ($ballots as $b) {
$pairs = getBallotPairs($cands, $b, $pairs);
}
$ballots_with_neither = array();
foreach ($ballots as $ballot) {
foreach ($cands as $I) {
foreach ($cands as $J) {
if ($I != $J) {
if (!isset($ballots_with_neither[$I])) {
$ballots_with_neither[$I] = array();
}
if (!isset($ballots_with_neither[$I][$J])) {
$ballots_with_neither[$I][$J] = 0;
}
if (!in_array($I, $ballot) and !in_array($J, $ballot)) {
$ballots_with_neither[$I][$J] += 1;
}
}
}
}
}
//print_r($ballots_with_neither);exit;
foreach ($ballots as $ballot) {
foreach ($cands as $I) {
$cprobs[$I] = array();
foreach ($cands as $J) {
if ($I != $J) {
$cprobs[$I][$J] = '';
//per Tse-min algorithm
$V = count($ballots);
$M = floor($V / 2) + 1;
$C = count($cands);
$R = count($ballots) - $ballots_with_neither[$I][$J];
$S = $ballots_with_neither[$I][$J];
$T = $pairs[$I][$J];
$IbeatJ = $pairs[$I][$J];
$JbeatI = $pairs[$J][$I];
$prob = $IbeatJ / ($IbeatJ + $JbeatI);
$Q = $prob;
$k_range = $M - $T - 1;
if ($M - $S <= $T && $T < $M) {
$sum = 0;
foreach (range(0, $k_range) as $k) {
$sum += binomial($S, $Q, $k);
}
$new_prob = 1 - $sum;
}
if ($T + $S < $M) {
$new_prob = 0;
}
if ($T >= $M) {
$new_prob = 1;
}
$cprobs[$I][$J] = $new_prob;
global $PRINT;
if ($PRINT) {
print "\n----------------------\n";
print "I is {$I}\n";
print "J is {$J}\n";
print "V is {$V}\n";
print "M is {$M}\n";
print "C is {$C}\n";
print "R is {$R}\n";
print "S is {$S}\n";
print "T is {$T}\n";
print "Q is {$Q}\n";
print "k range is {$k_range}\n";
print "calculated probability is {$new_prob}\n";
}
}
// I != J
}
// foreach J
}
//foreach I
foreach ($cprobs as $I => $J_array) {
$final_probs[$I] = round(array_product($J_array), 4);
}
}
return $final_probs;
}
function getResults($result, $filepath)
{
global $PRINT;
$cands = getCandidates($filepath);
$pairs = getAllPairs($cands);
$data = json_decode(file_get_contents($filepath), 1);
$year = $data['ELECTION']['id'];
if ($PRINT) {
print "\n\n ----- {$year} -----\n\n";
}
foreach ($data['BALLOTS'] as $ballot) {
$pairs = runBallot($cands, $pairs, $ballot);
}
$pairs = rerunForNeitherOnBallot($cands, $pairs, $data['BALLOTS']);
//printFormattedPairs($pairs);
$new_cands[$year] = array();
foreach ($cands as $cc) {
$new_cands[$year][$cc]['beat'] = array();
$new_cands[$year][$cc]['lost_to'] = array();
$new_cands[$year][$cc]['tied'] = array();
}
foreach ($cands as $c1) {
foreach ($cands as $c2) {
if ($c1 != $c2) {
if ($pairs[$c1][$c2] > $pairs[$c2][$c1]) {
// print "$c1 beats $c2\n";
$new_cands[$year][$c1]['beat'][] = $c2;
$new_cands[$year][$c2]['lost_to'][] = $c1;
}
if ($pairs[$c1][$c2] < $pairs[$c2][$c1]) {
// print "$c2 beats $c1\n";
}
if ($pairs[$c1][$c2] == $pairs[$c2][$c1]) {
$new_cands[$year][$c2]['tied'][] = $c1;
}
}
}
}
//print "\n\n ----- $year Summary -----\n\n";
//printFormattedResult($new_cands);
return $new_cands;
}
