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Fixing failing tests and misc cleanup

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This commit is contained in:
Alexander Liljengård
2016-05-24 15:12:29 +02:00
parent 5694a2fb30
commit 25b64d53f0
20 changed files with 132 additions and 125 deletions
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2
src/Numerics/BasicMath.php
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@ -6,7 +6,7 @@
* @author Jeff Moser <jeff@moserware.com>
* @copyright 2010 Jeff Moser
*/
class BasicMatch {
class BasicMath {
/**
* Squares the input (x^2 = x * x)

10
src/Numerics/GaussianDistribution.php
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@ -21,7 +21,7 @@ class GaussianDistribution
{
$this->_mean = $mean;
$this->_standardDeviation = $standardDeviation;
$this->_variance = BasicMatch::square($standardDeviation);
$this->_variance = BasicMath::square($standardDeviation);
if ($this->_variance != 0) {
$this->_precision = 1.0 / $this->_variance;
@ -128,7 +128,7 @@ class GaussianDistribution
$meanDifference = $left->_mean - $right->_mean;
$logSqrt2Pi = log(sqrt(2 * M_PI));
return -$logSqrt2Pi - (log($varianceSum) / 2.0) - (BasicMatch::square($meanDifference) / (2.0 * $varianceSum));
return -$logSqrt2Pi - (log($varianceSum) / 2.0) - (BasicMath::square($meanDifference) / (2.0 * $varianceSum));
}
public static function divide(GaussianDistribution $numerator, GaussianDistribution $denominator)
@ -149,7 +149,7 @@ class GaussianDistribution
$logSqrt2Pi = log(sqrt(2 * M_PI));
return log($denominator->_variance) + $logSqrt2Pi - log($varianceDifference) / 2.0 +
BasicMatch::square($meanDifference) / (2 * $varianceDifference);
BasicMath::square($meanDifference) / (2 * $varianceDifference);
}
public static function at($x, $mean = 0.0, $standardDeviation = 1.0)
@ -160,7 +160,7 @@ class GaussianDistribution
// stdDev * sqrt(2*pi)
$multiplier = 1.0 / ($standardDeviation * sqrt(2 * M_PI));
$expPart = exp((-1.0 * BasicMatch::square($x - $mean)) / (2 * BasicMatch::square($standardDeviation)));
$expPart = exp((-1.0 * BasicMath::square($x - $mean)) / (2 * BasicMath::square($standardDeviation)));
$result = $multiplier * $expPart;
return $result;
}
@ -241,7 +241,7 @@ class GaussianDistribution
for ($j = 0; $j < 2; $j++) {
$err = GaussianDistribution::errorFunctionCumulativeTo($x) - $pp;
$x += $err / (1.12837916709551257 * exp(-BasicMatch::square($x)) - $x * $err); // Halley
$x += $err / (1.12837916709551257 * exp(-BasicMath::square($x)) - $x * $err); // Halley
}
return ($p < 1.0) ? $x : -$x;