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Some minor documentation cleanup (e.g. converted C# comments to PHPDocumentor comments)

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This commit is contained in:
Jeff Moser
2010-10-08 21:44:36 -04:00
parent f863e150d4
commit d2fc7dc5c7
22 changed files with 174 additions and 159 deletions
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2
PHPSkills/Elo/FideEloCalculator.php
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@ -2,8 +2,8 @@
namespace Moserware\Skills\Elo;
require_once(dirname(__FILE__) . "/TwoPlayerEloCalculator.php");
require_once(dirname(__FILE__) . "/FideKFactor.php");
require_once(dirname(__FILE__) . "/TwoPlayerEloCalculator.php");
/** Including Elo's scheme as a simple comparison.
* See http://en.wikipedia.org/wiki/Elo_rating_system#Theory

20
PHPSkills/FactorGraphs/Factor.php
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@ -23,13 +23,17 @@ abstract class Factor
$this->_messageToVariableBinding = new HashMap();
}
/// Returns the log-normalization constant of that factor
/**
* @return The log-normalization constant of that factor
*/
public function getLogNormalization()
{
return 0;
}
/// Returns the number of messages that the factor has
/**
* @return The number of messages that the factor has
*/
public function getNumberOfMessages()
{
return count($this->_messages);
@ -45,7 +49,9 @@ abstract class Factor
return $this->_messages;
}
/// Update the message and marginal of the i-th variable that the factor is connected to
/**
* Update the message and marginal of the i-th variable that the factor is connected to
*/
public function updateMessageIndex($messageIndex)
{
Guard::argumentIsValidIndex($messageIndex, count($this->_messages), "messageIndex");
@ -59,7 +65,9 @@ abstract class Factor
throw new Exception();
}
/// Resets the marginal of the variables a factor is connected to
/**
* Resets the marginal of the variables a factor is connected to
*/
public function resetMarginals()
{
$allValues = &$this->_messageToVariableBinding->getAllValues();
@ -69,7 +77,9 @@ abstract class Factor
}
}
/// Sends the ith message to the marginal and returns the log-normalization constant
/**
* Sends the ith message to the marginal and returns the log-normalization constant
*/
public function sendMessageIndex($messageIndex)
{
Guard::argumentIsValidIndex($messageIndex, count($this->_messages), "messageIndex");

6
PHPSkills/FactorGraphs/FactorList.php
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@ -4,9 +4,9 @@ namespace Moserware\Skills\FactorGraphs;
require_once(dirname(__FILE__) . "/Factor.php");
/// <summary>
/// Helper class for computing the factor graph's normalization constant.
/// </summary>
/**
* Helper class for computing the factor graph's normalization constant.
*/
class FactorList
{
private $_list = array();

10
PHPSkills/Guard.php
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@ -1,11 +1,11 @@
<?php
namespace Moserware\Skills;
/// <summary>
/// Verifies argument contracts.
/// </summary>
/// <remarks>These are used until .NET 4.0 ships with Contracts. For more information,
/// see http://www.moserware.com/2008/01/borrowing-ideas-from-3-interesting.html</remarks>
/**
* Verifies argument contracts.
*
* @see http://www.moserware.com/2008/01/borrowing-ideas-from-3-interesting.html
*/
class Guard
{
public static function argumentNotNull($value, $parameterName)

3
PHPSkills/HashMap.php
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@ -2,6 +2,9 @@
namespace Moserware\Skills;
/**
* Basic hashmap that supports object keys.
*/
class HashMap
{
private $_hashToValue = array();

18
PHPSkills/Numerics/BasicMath.php
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@ -2,22 +2,30 @@
/**
* Basic math functions.
*
* PHP version 5
*
* @category Math
* @package PHPSkills
* @author Jeff Moser <jeff@moserware.com>
* @copyright 2010 Jeff Moser
*/
/**
* Squares the input (x^2 = x * x)
* @param number $x Value to square (x)
* @return number The squared value (x^2)
*/
function square($x)
{
return $x * $x;
}
function sum(array $itemsToSum, $funcName )
/**
* Sums the items in $itemsToSum
* @param array $itemsToSum The items to sum,
* @param callback $callback The function to apply to each array element before summing.
* @return number The sum.
*/
function sum(array $itemsToSum, $callback )
{
$mappedItems = array_map($funcName, $itemsToSum);
$mappedItems = array_map($callback, $itemsToSum);
return array_sum($mappedItems);
}

21
PHPSkills/Numerics/GaussianDistribution.php
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@ -1,30 +1,27 @@
<?php
/**
* Computes Gaussian values.
*
* PHP version 5
*
* @category Math
* @package PHPSkills
* @author Jeff Moser <jeff@moserware.com>
* @copyright 2010 Jeff Moser
*/
namespace Moserware\Numerics;
require_once(dirname(__FILE__) . "/basicmath.php");
/**
* Computes Gaussian (bell curve) values.
*
* @package PHPSkills
* @author Jeff Moser <jeff@moserware.com>
* @copyright 2010 Jeff Moser
*/
class GaussianDistribution
{
private $_mean;
private $_standardDeviation;
// Precision and PrecisionMean are used because they make multiplying and dividing simpler
// precision and precisionMean are used because they make multiplying and dividing simpler
// (the the accompanying math paper for more details)
private $_precision;
private $_precisionMean;
private $_variance;
function __construct($mean = 0.0, $standardDeviation = 1.0)
{
$this->_mean = $mean;

51
PHPSkills/Player.php
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@ -5,9 +5,9 @@ require_once(dirname(__FILE__) . "/Guard.php");
require_once(dirname(__FILE__) . "/ISupportPartialPlay.php");
require_once(dirname(__FILE__) . "/ISupportPartialUpdate.php");
/// <summary>
/// Represents a player who has a <see cref="Rating"/>.
/// </summary>
/**
* Represents a player who has a Rating.
*/
class Player implements ISupportPartialPlay, ISupportPartialUpdate
{
const DEFAULT_PARTIAL_PLAY_PERCENTAGE = 1.0; // = 100% play time
@ -17,12 +17,13 @@ class Player implements ISupportPartialPlay, ISupportPartialUpdate
private $_PartialPlayPercentage;
private $_PartialUpdatePercentage;
/// <summary>
/// Constructs a player.
/// </summary>
/// <param name="id">The identifier for the player, such as a name.</param>
/// <param name="partialPlayPercentage">The weight percentage to give this player when calculating a new rank.</param>
/// <param name="partialUpdatePercentage">/// Indicated how much of a skill update a player should receive where 0 represents no update and 1.0 represents 100% of the update.</param>
/**
* Constructs a player.
*
* @param mixed $id The identifier for the player, such as a name.
* @param number $partialPlayPercentage The weight percentage to give this player when calculating a new rank.
* @param number $partialUpdatePercentage Indicated how much of a skill update a player should receive where 0 represents no update and 1.0 represents 100% of the update.
*/
public function __construct($id,
$partialPlayPercentage = self::DEFAULT_PARTIAL_PLAY_PERCENTAGE,
$partialUpdatePercentage = self::DEFAULT_PARTIAL_UPDATE_PERCENTAGE)
@ -35,39 +36,31 @@ class Player implements ISupportPartialPlay, ISupportPartialUpdate
$this->_PartialUpdatePercentage = $partialUpdatePercentage;
}
/// <summary>
/// The identifier for the player, such as a name.
/// </summary>
/**
* The identifier for the player, such as a name.
*/
public function &getId()
{
$id = &$this->_Id;
return $this->_Id;
}
#region ISupportPartialPlay Members
/// <summary>
/// Indicates the percent of the time the player should be weighted where 0.0 indicates the player didn't play and 1.0 indicates the player played 100% of the time.
/// </summary>
/**
* Indicates the percent of the time the player should be weighted where 0.0 indicates the player didn't play and 1.0 indicates the player played 100% of the time.
*/
public function getPartialPlayPercentage()
{
return $this->_PartialPlayPercentage;
}
#endregion
#region ISupportPartialUpdate Members
/// <summary>
/// Indicated how much of a skill update a player should receive where 0.0 represents no update and 1.0 represents 100% of the update.
/// </summary>
/**
* Indicated how much of a skill update a player should receive where 0.0 represents no update and 1.0 represents 100% of the update.
*/
public function getPartialUpdatePercentage()
{
return $this->_PartialUpdatePercentage;
}
#endregion
public function __toString()
{
if ($this->_Id != null)

18
PHPSkills/RankSorter.php
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@ -2,17 +2,17 @@
namespace Moserware\Skills;
/// <summary>
/// Helper class to sort ranks in non-decreasing order.
/// </summary>
/**
* Helper class to sort ranks in non-decreasing order.
*/
class RankSorter
{
/// <summary>
/// Performs an in-place sort of the <paramref name="items"/> in according to the <paramref name="ranks"/> in non-decreasing order.
/// </summary>
/// <typeparam name="T">The types of items to sort.</typeparam>
/// <param name="items">The items to sort according to the order specified by <paramref name="ranks"/>.</param>
/// <param name="ranks">The ranks for each item where 1 is first place.</param>
/**
* Performs an in-place sort of the items in according to the ranks in non-decreasing order.
*
* @param $items The items to sort according to the order specified by ranks.
* @param $ranks The ranks for each item where 1 is first place.
*/
public static function sort(array &$teams, array &$teamRanks)
{
array_multisort($teamRanks, $teams);

29
PHPSkills/SkillCalculator.php
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@ -21,25 +21,24 @@ abstract class SkillCalculator
$this->_playersPerTeamAllowed = $playerPerTeamAllowed;
}
/// <summary>
/// Calculates new ratings based on the prior ratings and team ranks.
/// </summary>
/// <typeparam name="TPlayer">The underlying type of the player.</typeparam>
/// <param name="gameInfo">Parameters for the game.</param>
/// <param name="teams">A mapping of team players and their ratings.</param>
/// <param name="teamRanks">The ranks of the teams where 1 is first place. For a tie, repeat the number (e.g. 1, 2, 2)</param>
/// <returns>All the players and their new ratings.</returns>
/**
* Calculates new ratings based on the prior ratings and team ranks.
* @param $gameInfo Parameters for the game.
* @param $teams A mapping of team players and their ratings.
* @param $teamRanks The ranks of the teams where 1 is first place. For a tie, repeat the number (e.g. 1, 2, 2).
* @return All the players and their new ratings.
*/
public abstract function calculateNewRatings(GameInfo &$gameInfo,
array $teamsOfPlayerToRatings,
array $teamRanks);
/// <summary>
/// Calculates the match quality as the likelihood of all teams drawing.
/// </summary>
/// <typeparam name="TPlayer">The underlying type of the player.</typeparam>
/// <param name="gameInfo">Parameters for the game.</param>
/// <param name="teams">A mapping of team players and their ratings.</param>
/// <returns>The quality of the match between the teams as a percentage (0% = bad, 100% = well matched).</returns>
/**
* Calculates the match quality as the likelihood of all teams drawing.
*
* @param $gameInfo Parameters for the game.
* @param $teams A mapping of team players and their ratings.
* @return The quality of the match between the teams as a percentage (0% = bad, 100% = well matched).
*/
public abstract function calculateMatchQuality(GameInfo &$gameInfo,
array &$teamsOfPlayerToRatings);

6
PHPSkills/TrueSkill/FactorGraphTrueSkillCalculator.php
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@ -30,9 +30,9 @@ use Moserware\Skills\SkillCalculator;
use Moserware\Skills\SkillCalculatorSupportedOptions;
use Moserware\Skills\TeamsRange;
/// <summary>
/// Calculates TrueSkill using a full factor graph.
/// </summary>
/**
* Calculates TrueSkill using a full factor graph.
*/
class FactorGraphTrueSkillCalculator extends SkillCalculator
{
public function __construct()

4
PHPSkills/TrueSkill/Factors/GaussianFactor.php
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@ -19,7 +19,9 @@ abstract class GaussianFactor extends Factor
parent::__construct($name);
}
/// Sends the factor-graph message with and returns the log-normalization constant
/**
* Sends the factor-graph message with and returns the log-normalization constant.
*/
protected function sendMessageVariable(Message &$message, Variable &$variable)
{
$marginal = &$variable->getValue();

17
PHPSkills/TrueSkill/Factors/GaussianGreaterThanFactor.php
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@ -1,21 +1,22 @@
<?php
namespace Moserware\Skills\TrueSkill\Factors;
require_once(dirname(__FILE__) . "/GaussianFactor.php");
require_once(dirname(__FILE__) . "/../TruncatedGaussianCorrectionFunctions.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Message.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Variable.php");
require_once(dirname(__FILE__) . "/../../Numerics/GaussianDistribution.php");
require_once(dirname(__FILE__) . "/../TruncatedGaussianCorrectionFunctions.php");
require_once(dirname(__FILE__) . "/GaussianFactor.php");
use Moserware\Numerics\GaussianDistribution;
use Moserware\Skills\TrueSkill\TruncatedGaussianCorrectionFunctions;
use Moserware\Skills\FactorGraphs\Message;
use Moserware\Skills\FactorGraphs\Variable;
/// <summary>
/// Factor representing a team difference that has exceeded the draw margin.
/// </summary>
/// <remarks>See the accompanying math paper for more details.</remarks>
/**
* Factor representing a team difference that has exceeded the draw margin.
*
* See the accompanying math paper for more details.
*/
class GaussianGreaterThanFactor extends GaussianFactor
{
private $_epsilon;
@ -72,12 +73,12 @@ class GaussianGreaterThanFactor extends GaussianFactor
GaussianDistribution::multiply($oldMessage, $newMarginal),
$oldMarginal);
/// Update the message and marginal
// Update the message and marginal
$message->setValue($newMessage);
$variable->setValue($newMarginal);
/// Return the difference in the new marginal
// Return the difference in the new marginal
return GaussianDistribution::subtract($newMarginal, $oldMarginal);
}
}

15
PHPSkills/TrueSkill/Factors/GaussianLikelihoodFactor.php
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@ -1,19 +1,20 @@
<?php
namespace Moserware\Skills\TrueSkill\Factors;
require_once(dirname(__FILE__) . "/GaussianFactor.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Message.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Variable.php");
require_once(dirname(__FILE__) . "/../../Numerics/GaussianDistribution.php");
require_once(dirname(__FILE__) . "/GaussianFactor.php");
use Moserware\Numerics\GaussianDistribution;
use Moserware\Skills\FactorGraphs\Message;
use Moserware\Skills\FactorGraphs\Variable;
/// <summary>
/// Connects two variables and adds uncertainty.
/// </summary>
/// <remarks>See the accompanying math paper for more details.</remarks>
/**
* Connects two variables and adds uncertainty.
*
* See the accompanying math paper for more details.
*/
class GaussianLikelihoodFactor extends GaussianFactor
{
private $_precision;
@ -55,12 +56,12 @@ class GaussianLikelihoodFactor extends GaussianFactor
$newMarginal = GaussianDistribution::multiply($oldMarginalWithoutMessage, $newMessage);
/// Update the message and marginal
// Update the message and marginal
$message1->setValue($newMessage);
$variable1->setValue($newMarginal);
/// Return the difference in the new marginal
// Return the difference in the new marginal
return GaussianDistribution::subtract($newMarginal, $marginal1);
}

12
PHPSkills/TrueSkill/Factors/GaussianPriorFactor.php
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@ -1,20 +1,20 @@
<?php
namespace Moserware\Skills\TrueSkill\Factors;
require_once(dirname(__FILE__) . "/GaussianFactor.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Message.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Variable.php");
require_once(dirname(__FILE__) . "/../../Numerics/GaussianDistribution.php");
require_once(dirname(__FILE__) . "/GaussianFactor.php");
use Moserware\Numerics\GaussianDistribution;
use Moserware\Skills\FactorGraphs\Message;
use Moserware\Skills\FactorGraphs\Variable;
/// <summary>
/// Supplies the factor graph with prior information.
/// </summary>
/// <remarks>See the accompanying math paper for more details.</remarks>
/**
* Supplies the factor graph with prior information.
*
* See the accompanying math paper for more details.
*/
class GaussianPriorFactor extends GaussianFactor
{
private $_newMessage;

15
PHPSkills/TrueSkill/Factors/GaussianWeightedSumFactor.php
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@ -1,22 +1,23 @@
<?php
namespace Moserware\Skills\TrueSkill\Factors;
require_once(dirname(__FILE__) . "/GaussianFactor.php");
require_once(dirname(__FILE__) . "/../../Guard.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Message.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Variable.php");
require_once(dirname(__FILE__) . "/../../Numerics/GaussianDistribution.php");
require_once(dirname(__FILE__) . "/../../Numerics/BasicMath.php");
require_once(dirname(__FILE__) . "/GaussianFactor.php");
use Moserware\Numerics\GaussianDistribution;
use Moserware\Skills\Guard;
use Moserware\Skills\FactorGraphs\Message;
use Moserware\Skills\FactorGraphs\Variable;
/// <summary>
/// Factor that sums together multiple Gaussians.
/// </summary>
/// <remarks>See the accompanying math paper for more details.</remarks>
/**
* Factor that sums together multiple Gaussians.
*
* See the accompanying math paper for more details.s
*/
class GaussianWeightedSumFactor extends GaussianFactor
{
private $_variableIndexOrdersForWeights = array();
@ -189,12 +190,12 @@ class GaussianWeightedSumFactor extends GaussianFactor
$newMarginal = GaussianDistribution::multiply($oldMarginalWithoutMessage, $newMessage);
/// Update the message and marginal
// Update the message and marginal
$messages[0]->setValue($newMessage);
$variables[0]->setValue($newMarginal);
/// Return the difference in the new marginal
// Return the difference in the new marginal
$finalDiff = GaussianDistribution::subtract($newMarginal, $marginal0);
return $finalDiff;
}

15
PHPSkills/TrueSkill/Factors/GaussianWithinFactor.php
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@ -1,21 +1,22 @@
<?php
namespace Moserware\Skills\TrueSkill\Factors;
require_once(dirname(__FILE__) . "/GaussianFactor.php");
require_once(dirname(__FILE__) . "/../TruncatedGaussianCorrectionFunctions.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Message.php");
require_once(dirname(__FILE__) . "/../../FactorGraphs/Variable.php");
require_once(dirname(__FILE__) . "/../../Numerics/GaussianDistribution.php");
require_once(dirname(__FILE__) . "/GaussianFactor.php");
use Moserware\Numerics\GaussianDistribution;
use Moserware\Skills\TrueSkill\TruncatedGaussianCorrectionFunctions;
use Moserware\Skills\FactorGraphs\Message;
use Moserware\Skills\FactorGraphs\Variable;
/// <summary>
/// Factor representing a team difference that has not exceeded the draw margin.
/// </summary>
/// <remarks>See the accompanying math paper for more details.</remarks>
/**
* Factor representing a team difference that has not exceeded the draw margin.
*
* See the accompanying math paper for more details.
*/
class GaussianWithinFactor extends GaussianFactor
{
private $_epsilon;
@ -71,11 +72,11 @@ class GaussianWithinFactor extends GaussianFactor
GaussianDistribution::multiply($oldMessage, $newMarginal),
$oldMarginal);
/// Update the message and marginal
// Update the message and marginal
$message->setValue($newMessage);
$variable->setValue($newMarginal);
/// Return the difference in the new marginal
// Return the difference in the new marginal
return GaussianDistribution::subtract($newMarginal, $oldMarginal);
}
}

3
PHPSkills/TrueSkill/Layers/IteratedTeamDifferencesInnerLayer.php
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@ -47,8 +47,7 @@ class IteratedTeamDifferencesInnerLayer extends TrueSkillFactorGraphLayer
}
public function createPriorSchedule()
{
// BLOG about $loop
{
switch (count($this->getInputVariablesGroups()))
{
case 0:

3
PHPSkills/TrueSkill/Layers/PlayerPerformancesToTeamPerformancesLayer.php
View File

@ -73,8 +73,7 @@ class PlayerPerformancesToTeamPerformancesLayer extends TrueSkillFactorGraphLaye
}
public function createPosteriorSchedule()
{
// BLOG
{
$allFactors = array();
$localFactors = &$this->getLocalFactors();
foreach($localFactors as &$currentFactor)

32
PHPSkills/TrueSkill/TruncatedGaussianCorrectionFunctions.php
View File

@ -9,14 +9,14 @@ class TruncatedGaussianCorrectionFunctions
{
// These functions from the bottom of page 4 of the TrueSkill paper.
/// <summary>
/// The "V" function where the team performance difference is greater than the draw margin.
/// </summary>
/// <remarks>In the reference F# implementation, this is referred to as "the additive
/// correction of a single-sided truncated Gaussian with unit variance."</remarks>
/// <param name="teamPerformanceDifference"></param>
/// <param name="drawMargin">In the paper, it's referred to as just "ε".</param>
/// <returns></returns>
/**
* 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 number $drawMargin In the paper, it's referred to as just "ε".
*/
public static function vExceedsMarginScaled($teamPerformanceDifference, $drawMargin, $c)
{
return self::vExceedsMargin($teamPerformanceDifference/$c, $drawMargin/$c);
@ -34,15 +34,13 @@ class TruncatedGaussianCorrectionFunctions
return GaussianDistribution::at($teamPerformanceDifference - $drawMargin)/$denominator;
}
/// <summary>
/// The "W" function where the team performance difference is greater than the draw margin.
/// </summary>
/// <remarks>In the reference F# implementation, this is referred to as "the multiplicative
/// correction of a single-sided truncated Gaussian with unit variance."</remarks>
/// <param name="teamPerformanceDifference"></param>
/// <param name="drawMargin"></param>
/// <param name="c"></param>
/// <returns></returns>
/**
* 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);

18
PHPSkills/TrueSkill/TwoPlayerTrueSkillCalculator.php
View File

@ -30,13 +30,13 @@ use Moserware\Skills\SkillCalculatorSupportedOptions;
use Moserware\Skills\PlayersRange;
use Moserware\Skills\TeamsRange;
/// <summary>
/// Calculates the new ratings for only two players.
/// </summary>
/// <remarks>
/// When you only have two players, a lot of the math simplifies. The main purpose of this class
/// is to show the bare minimum of what a TrueSkill implementation should have.
/// </remarks>
/**
* Calculates the new ratings for only two players.
*
* When you only have two players, a lot of the math simplifies. The main purpose of this class
* is to show the bare minimum of what a TrueSkill implementation should have.
*/
class TwoPlayerTrueSkillCalculator extends SkillCalculator
{
public function __construct()
@ -139,7 +139,9 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
return new Rating($newMean, $newStdDev);
}
/// <inheritdoc/>
/**
* {@inheritdoc }
*/
public function calculateMatchQuality(GameInfo &$gameInfo, array &$teams)
{
Guard::argumentNotNull($gameInfo, "gameInfo");

15
PHPSkills/TrueSkill/TwoTeamTrueSkillCalculator.php
View File

@ -34,12 +34,11 @@ use Moserware\Skills\TeamsRange;
use Moserware\Skills\Team;
/// <summary>
/// Calculates new ratings for only two teams where each team has 1 or more players.
/// </summary>
/// <remarks>
/// When you only have two teams, the math is still simple: no factor graphs are used yet.
/// </remarks>
/**
* Calculates new ratings for only two teams where each team has 1 or more players.
*
* When you only have two teams, the math is still simple: no factor graphs are used yet.
*/
class TwoTeamTrueSkillCalculator extends SkillCalculator
{
public function __construct()
@ -165,7 +164,9 @@ class TwoTeamTrueSkillCalculator extends SkillCalculator
}
}
/// <inheritdoc/>
/**
* {@inheritdoc }
*/
public function calculateMatchQuality(GameInfo &$gameInfo,
array &$teams)
{