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Cleanup in src/, adding namespaces, removing php closing tag and general code cleanup

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Alexander Liljengård
2016-05-24 14:10:39 +02:00
parent 9f97eb1653
commit 5694a2fb30
64 changed files with 891 additions and 1328 deletions
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84
src/TrueSkill/TruncatedGaussianCorrectionFunctions.php
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@ -1,9 +1,6 @@
<?php
namespace Moserware\Skills\TrueSkill;
<?php namespace Moserware\Skills\TrueSkill;
require_once(dirname(__FILE__) . '/../Numerics/GaussianDistribution.php');
use Moserware\Numerics\GaussianDistribution;
use Moserware\Skills\Numerics\GaussianDistribution;
class TruncatedGaussianCorrectionFunctions
{
@ -11,64 +8,64 @@ class TruncatedGaussianCorrectionFunctions
/**
* The "V" function where the team performance difference is greater than the draw margin.
*
*
* In the reference F# implementation, this is referred to as "the additive
* correction of a single-sided truncated Gaussian with unit variance."
*
*
* @param $teamPerformanceDifference
* @param number $drawMargin In the paper, it's referred to as just "ε".
* @param $c
* @return float
*/
public static function vExceedsMarginScaled($teamPerformanceDifference, $drawMargin, $c)
{
return self::vExceedsMargin($teamPerformanceDifference/$c, $drawMargin/$c);
return self::vExceedsMargin($teamPerformanceDifference / $c, $drawMargin / $c);
}
public static function vExceedsMargin($teamPerformanceDifference, $drawMargin)
{
$denominator = GaussianDistribution::cumulativeTo($teamPerformanceDifference - $drawMargin);
if ($denominator < 2.222758749e-162)
{
if ($denominator < 2.222758749e-162) {
return -$teamPerformanceDifference + $drawMargin;
}
return GaussianDistribution::at($teamPerformanceDifference - $drawMargin)/$denominator;
return GaussianDistribution::at($teamPerformanceDifference - $drawMargin) / $denominator;
}
/**
* The "W" function where the team performance difference is greater than the draw margin.
*
*
* In the reference F# implementation, this is referred to as "the multiplicative
* correction of a single-sided truncated Gaussian with unit variance."
*/
public static function wExceedsMarginScaled($teamPerformanceDifference, $drawMargin, $c)
{
return self::wExceedsMargin($teamPerformanceDifference/$c, $drawMargin/$c);
return self::wExceedsMargin($teamPerformanceDifference / $c, $drawMargin / $c);
}
public static function wExceedsMargin($teamPerformanceDifference, $drawMargin)
{
$denominator = GaussianDistribution::cumulativeTo($teamPerformanceDifference - $drawMargin);
if ($denominator < 2.222758749e-162)
{
if ($teamPerformanceDifference < 0.0)
{
if ($denominator < 2.222758749e-162) {
if ($teamPerformanceDifference < 0.0) {
return 1.0;
}
return 0.0;
}
$vWin = self::vExceedsMargin($teamPerformanceDifference, $drawMargin);
return $vWin*($vWin + $teamPerformanceDifference - $drawMargin);
return $vWin * ($vWin + $teamPerformanceDifference - $drawMargin);
}
// the additive correction of a double-sided truncated Gaussian with unit variance
public static function vWithinMarginScaled($teamPerformanceDifference, $drawMargin, $c)
{
return self::vWithinMargin($teamPerformanceDifference/$c, $drawMargin/$c);
return self::vWithinMargin($teamPerformanceDifference / $c, $drawMargin / $c);
}
// from F#:
public static function vWithinMargin($teamPerformanceDifference, $drawMargin)
{
@ -77,10 +74,8 @@ class TruncatedGaussianCorrectionFunctions
GaussianDistribution::cumulativeTo($drawMargin - $teamPerformanceDifferenceAbsoluteValue) -
GaussianDistribution::cumulativeTo(-$drawMargin - $teamPerformanceDifferenceAbsoluteValue);
if ($denominator < 2.222758749e-162)
{
if ($teamPerformanceDifference < 0.0)
{
if ($denominator < 2.222758749e-162) {
if ($teamPerformanceDifference < 0.0) {
return -$teamPerformanceDifference - $drawMargin;
}
@ -88,20 +83,19 @@ class TruncatedGaussianCorrectionFunctions
}
$numerator = GaussianDistribution::at(-$drawMargin - $teamPerformanceDifferenceAbsoluteValue) -
GaussianDistribution::at($drawMargin - $teamPerformanceDifferenceAbsoluteValue);
GaussianDistribution::at($drawMargin - $teamPerformanceDifferenceAbsoluteValue);
if ($teamPerformanceDifference < 0.0)
{
return -$numerator/$denominator;
if ($teamPerformanceDifference < 0.0) {
return -$numerator / $denominator;
}
return $numerator/$denominator;
return $numerator / $denominator;
}
// the multiplicative correction of a double-sided truncated Gaussian with unit variance
public static function wWithinMarginScaled($teamPerformanceDifference, $drawMargin, $c)
{
return self::wWithinMargin($teamPerformanceDifference/$c, $drawMargin/$c);
return self::wWithinMargin($teamPerformanceDifference / $c, $drawMargin / $c);
}
// From F#:
@ -109,25 +103,23 @@ class TruncatedGaussianCorrectionFunctions
{
$teamPerformanceDifferenceAbsoluteValue = abs($teamPerformanceDifference);
$denominator = GaussianDistribution::cumulativeTo($drawMargin - $teamPerformanceDifferenceAbsoluteValue)
-
GaussianDistribution::cumulativeTo(-$drawMargin - $teamPerformanceDifferenceAbsoluteValue);
-
GaussianDistribution::cumulativeTo(-$drawMargin - $teamPerformanceDifferenceAbsoluteValue);
if ($denominator < 2.222758749e-162)
{
if ($denominator < 2.222758749e-162) {
return 1.0;
}
$vt = self::vWithinMargin($teamPerformanceDifferenceAbsoluteValue, $drawMargin);
return $vt*$vt +
(
($drawMargin - $teamPerformanceDifferenceAbsoluteValue)
*
GaussianDistribution::at(
$drawMargin - $teamPerformanceDifferenceAbsoluteValue)
- (-$drawMargin - $teamPerformanceDifferenceAbsoluteValue)
*
GaussianDistribution::at(-$drawMargin - $teamPerformanceDifferenceAbsoluteValue))/$denominator;
return $vt * $vt +
(
($drawMargin - $teamPerformanceDifferenceAbsoluteValue)
*
GaussianDistribution::at(
$drawMargin - $teamPerformanceDifferenceAbsoluteValue)
- (-$drawMargin - $teamPerformanceDifferenceAbsoluteValue)
*
GaussianDistribution::at(-$drawMargin - $teamPerformanceDifferenceAbsoluteValue)) / $denominator;
}
}
?>
}