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Alex Wulf
2022-07-05 16:21:06 +02:00
parent fd5d276359
commit 689e3b75fe
38 changed files with 144 additions and 355 deletions
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23
src/Rating.php
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@ -5,28 +5,19 @@ namespace DNW\Skills;
// Container for a player's rating.
use DNW\Skills\Numerics\GaussianDistribution;
class Rating
class Rating implements \Stringable
{
const CONSERVATIVE_STANDARD_DEVIATION_MULTIPLIER = 3;
private $_conservativeStandardDeviationMultiplier;
private $_mean;
private $_standardDeviation;
final const CONSERVATIVE_STANDARD_DEVIATION_MULTIPLIER = 3;
/**
* Constructs a rating.
*
* @param float $mean The statistical mean value of the rating (also known as mu).
* @param float $standardDeviation The standard deviation of the rating (also known as s).
* @param float|int $conservativeStandardDeviationMultiplier optional The number of standardDeviations to subtract from the mean to achieve a conservative rating.
* @param float $_mean The statistical mean value of the rating (also known as mu).
* @param float $_standardDeviation The standard deviation of the rating (also known as s).
* @param float|int $_conservativeStandardDeviationMultiplier optional The number of standardDeviations to subtract from the mean to achieve a conservative rating.
*/
public function __construct($mean, $standardDeviation, $conservativeStandardDeviationMultiplier = self::CONSERVATIVE_STANDARD_DEVIATION_MULTIPLIER)
public function __construct(private $_mean, private $_standardDeviation, private $_conservativeStandardDeviationMultiplier = self::CONSERVATIVE_STANDARD_DEVIATION_MULTIPLIER)
{
$this->_mean = $mean;
$this->_standardDeviation = $standardDeviation;
$this->_conservativeStandardDeviationMultiplier = $conservativeStandardDeviationMultiplier;
}
/**
@ -76,7 +67,7 @@ class Rating
return new Rating($partialPosteriorGaussion->getMean(), $partialPosteriorGaussion->getStandardDeviation(), $prior->_conservativeStandardDeviationMultiplier);
}
public function __toString()
public function __toString(): string
{
return sprintf('mean=%.4f, standardDeviation=%.4f', $this->_mean, $this->_standardDeviation);
}