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Tenative pass at getting prior layer working. Found out about division by zero and closure differences.

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This commit is contained in:
Jeff Moser
2010-09-25 18:25:56 -04:00
parent 086d94865f
commit fa10d276d6
11 changed files with 36 additions and 23 deletions
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9
PHPSkills/FactorGraphs/Factor.php
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@@ -9,7 +9,6 @@ require_once(dirname(__FILE__) . "/Variable.php");
use Moserware\Skills\Guard;
use Moserware\Skills\HashMap;
abstract class Factor
{
private $_messages = array();
@@ -21,7 +20,7 @@ abstract class Factor
protected function __construct($name)
{
$this->_name = "Factor[" . $name . "]";
$this->_messagesToVariableBinding = new HashMap();
$this->_messageToVariableBinding = new HashMap();
}
/// Returns the log-normalization constant of that factor
@@ -81,12 +80,12 @@ abstract class Factor
public abstract function createVariableToMessageBinding(Variable &$variable);
protected function createVariableToMessageBindingWithMessage(Variable &$variable, Variable &$message)
protected function createVariableToMessageBindingWithMessage(Variable &$variable, Message &$message)
{
$index = count($this->_messages);
$this->_messages[] = $message;
$this->_messages[] = $message;
$this->_messageToVariableBinding->setValue($message, $variable);
$this->_variables[] = $variable;
$this->_variables[] = &$variable;
return $message;
}

2
PHPSkills/FactorGraphs/FactorGraphLayer.php
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@@ -38,7 +38,7 @@ abstract class FactorGraphLayer
return $this->_localFactors;
}
public function &setInputVariablesGroups(&$value)
public function setInputVariablesGroups(&$value)
{
$this->_inputVariablesGroups = $value;
}

5
PHPSkills/FactorGraphs/VariableFactory.php
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@@ -11,7 +11,7 @@ class VariableFactory
public function __construct($variablePriorInitializer)
{
$this->_variablePriorInitializer = $variablePriorInitializer;
$this->_variablePriorInitializer = &$variablePriorInitializer;
}
public function createBasicVariable()
@@ -22,7 +22,8 @@ class VariableFactory
public function createKeyedVariable($key)
{
$newVar = new KeyedVariable($key, $this->_variablePriorInitializer());
$initializer = $this->_variablePriorInitializer;
$newVar = new KeyedVariable($key, "key variable", $initializer());
return $newVar;
}
}

2
PHPSkills/HashMap.php
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@@ -1,5 +1,7 @@
<?php
namespace Moserware\Skills;
class HashMap
{
private $_hashToValue = array();

16
PHPSkills/Numerics/GaussianDistribution.php
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@@ -81,9 +81,19 @@ class GaussianDistribution
$result = new GaussianDistribution();
$result->_precision = $precision;
$result->_precisionMean = $precisionMean;
$result->_variance = 1.0/$precision;
$result->_standardDeviation = sqrt($result->_variance);
$result->_mean = $result->_precisionMean/$result->_precision;
if($precision != 0)
{
$result->_variance = 1.0/$precision;
$result->_standardDeviation = sqrt($result->_variance);
$result->_mean = $result->_precisionMean/$result->_precision;
}
else
{
$result->_variance = \INF;
$result->_standardDeviation = \INF;
$result->_mean = \NAN;
}
return $result;
}

2
PHPSkills/RatingContainer.php
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@@ -9,7 +9,7 @@ class RatingContainer
public function __construct()
{
$this->_playerToRating = new \HashMap();
$this->_playerToRating = new HashMap();
}
public function getRating($player)

2
PHPSkills/TrueSkill/Factors/GaussianFactor.php
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@@ -31,7 +31,7 @@ abstract class GaussianFactor extends Factor
public function createVariableToMessageBinding(Variable &$variable)
{
return parent::createVariableToMessageBinding($variable,
return parent::createVariableToMessageBindingWithMessage($variable,
new Message(
GaussianDistribution::fromPrecisionMean(0, 0),
"message from {0} to {1}", $this));

8
PHPSkills/TrueSkill/Factors/GaussianPriorFactor.php
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@@ -23,11 +23,11 @@ class GaussianPriorFactor extends GaussianFactor
{
parent::__construct("Prior value going to {0}");
$this->_newMessage = new GaussianDistribution($mean, sqrt($variance));
$this->createVariableToMessageBinding($variable,
new Message(
GaussianDistribution::fromPrecisionMean(0, 0),
$newMessage = new Message(GaussianDistribution::fromPrecisionMean(0, 0),
"message from {0} to {1}",
$this, variable));
$this, $variable);
$this->createVariableToMessageBindingWithMessage($variable, $newMessage);
}
protected function updateMessageVariable(Message &$message, Variable &$variable)

5
PHPSkills/TrueSkill/Layers/PlayerPriorValuesToSkillsLayer.php
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@@ -35,11 +35,12 @@ class PlayerPriorValuesToSkillsLayer extends TrueSkillFactorGraphLayer
{
$currentTeamPlayerRating = $currentTeam->getRating($currentTeamPlayer);
$playerSkill = $this->createSkillOutputVariable($currentTeamPlayer);
$this->addLayerFactor($this->createPriorFactor($currentTeamPlayer, $currentTeamPlayerRating, $playerSkill));
$priorFactor = $this->createPriorFactor($currentTeamPlayer, $currentTeamPlayerRating, $playerSkill);
$this->addLayerFactor($priorFactor);
$currentTeamSkills[] = $playerSkill;
}
$outputVariablesGroups = $this->getOutputVariablesGroups();
$outputVariablesGroups = &$this->getOutputVariablesGroups();
$outputVariablesGroups[] = $currentTeamSkills;
}
}

2
PHPSkills/TrueSkill/Layers/PlayerSkillsToPerformancesLayer.php
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@@ -52,7 +52,7 @@ class PlayerSkillsToPerformancesLayer extends TrueSkillFactorGraphLayer
array_map(
function($likelihood)
{
return $this->scheduleStep("Skill to Perf step", $likelihood, 0);
return new ScheduleStep("Skill to Perf step", $likelihood, 0);
},
$this->getLocalFactors()),
"All skill to performance sending");

6
PHPSkills/TrueSkill/TrueSkillFactorGraph.php
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@@ -15,6 +15,7 @@ require_once(dirname(__FILE__) . '/Layers/PlayerSkillsToPerformancesLayer.php');
require_once(dirname(__FILE__) . '/Layers/TeamDifferencesComparisonLayer.php');
require_once(dirname(__FILE__) . '/Layers/TeamPerformancesToTeamPerformanceDifferencesLayer.php');
use Moserware\Numerics\GaussianDistribution;
use Moserware\Skills\GameInfo;
use Moserware\Skills\Rating;
use Moserware\Skills\FactorGraphs\FactorGraph;
@@ -32,8 +33,7 @@ class TrueSkillFactorGraph extends FactorGraph
{
private $_gameInfo;
private $_layers;
private $_priorLayer;
private $_variableFactory;
private $_priorLayer;
public function __construct(GameInfo &$gameInfo, &$teams, array $teamRanks)
{
@@ -44,8 +44,8 @@ class TrueSkillFactorGraph extends FactorGraph
{
return GaussianDistribution::fromPrecisionMean(0, 0);
});
$this->setVariableFactory($newFactory);
$this->_layers = array(
$this->_priorLayer,
new PlayerSkillsToPerformancesLayer($this),