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33 lines
1.0 KiB
PHP
33 lines
1.0 KiB
PHP
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<?php
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namespace Moserware\Skills\TrueSkill\Factors;
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abstract class GaussianFactor extends Factor
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{
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protected function __construct($name)
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{
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parent::__construct($name);
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}
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/// Sends the factor-graph message with and returns the log-normalization constant
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protected function sendMessageVariable(Message $message, Variable $variable)
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{
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$marginal = $variable->getValue();
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$messageValue = $message->getValue();
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$logZ = GaussianDistribution::logProductNormalization($marginal, $messageValue);
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$variable->setValue($marginal*$messageValue);
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return $logZ;
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}
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public function createVariableToMessageBinding(Variable $variable)
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{
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return parent::createVariableToMessageBinding($variable,
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new Message(
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GaussianDistribution::fromPrecisionMean(0, 0),
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"message from {0} to {1}", $this));
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}
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}
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?>
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