php-ml/tests/Phpml/NeuralNetwork/ActivationFunction/SigmoidTest.php

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<?php
declare (strict_types = 1);
namespace tests\Phpml\NeuralNetwork\ActivationFunction;
use Phpml\NeuralNetwork\ActivationFunction\Sigmoid;
class SigmoidTest extends \PHPUnit_Framework_TestCase
{
/**
* @param $beta
* @param $expected
* @param $value
*
* @dataProvider sigmoidProvider
*/
public function testSigmoidActivationFunction($beta, $expected, $value)
{
$sigmoid = new Sigmoid($beta);
$this->assertEquals($expected, $sigmoid->compute($value), '', 0.001);
}
/**
* @return array
*/
public function sigmoidProvider()
{
return [
[1.0, 1, 7.25],
[2.0, 1, 3.75],
[1.0, 0.5, 0],
[0.5, 0.5, 0],
[1.0, 0, -7.25],
[2.0, 0, -3.75],
];
}
}