131 lines
3.6 KiB
PHP
131 lines
3.6 KiB
PHP
<?php
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namespace Rubix\ML\Tests\NeuralNet\ActivationFunctions;
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use Tensor\Matrix;
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use Rubix\ML\NeuralNet\ActivationFunctions\Softsign;
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use Rubix\ML\NeuralNet\ActivationFunctions\ActivationFunction;
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use PHPUnit\Framework\TestCase;
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use Generator;
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/**
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* @group ActivationFunctions
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* @covers \Rubix\ML\NeuralNet\ActivationFunctions\Softsign
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*/
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class SoftsignTest extends TestCase
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{
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/**
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* @var \Rubix\ML\NeuralNet\ActivationFunctions\Softsign
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*/
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protected $activationFn;
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/**
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* @before
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*/
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protected function setUp() : void
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{
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$this->activationFn = new Softsign();
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}
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/**
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* @test
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*/
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public function build() : void
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{
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$this->assertInstanceOf(Softsign::class, $this->activationFn);
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$this->assertInstanceOf(ActivationFunction::class, $this->activationFn);
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}
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/**
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* @test
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* @dataProvider computeProvider
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*
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* @param \Tensor\Matrix $input
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* @param array[] $expected
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*/
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public function compute(Matrix $input, array $expected) : void
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{
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$activations = $this->activationFn->compute($input)->asArray();
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$this->assertEquals($expected, $activations);
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}
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/**
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* @return \Generator<array>
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*/
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public function computeProvider() : Generator
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{
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yield [
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Matrix::quick([
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[1.0, -0.5, 0.0, 20.0, -10.0],
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]),
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[
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[0.5, -0.3333333333333333, 0.0, 0.9523809523809523, -0.9090909090909091],
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],
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];
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yield [
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Matrix::quick([
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[-0.12, 0.31, -0.49],
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[0.99, 0.08, -0.03],
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[0.05, -0.52, 0.54],
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]),
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[
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[-0.10714285714285712, 0.23664122137404578, -0.32885906040268453],
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[0.49748743718592964, 0.07407407407407407, -0.029126213592233007],
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[0.047619047619047616, -0.34210526315789475, 0.35064935064935066],
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],
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];
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}
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/**
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* @test
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* @dataProvider differentiateProvider
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*
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* @param \Tensor\Matrix $input
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* @param \Tensor\Matrix $activations
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* @param array[] $expected
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*/
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public function differentiate(Matrix $input, Matrix $activations, array $expected) : void
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{
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$derivatives = $this->activationFn->differentiate($input, $activations)->asArray();
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$this->assertEquals($expected, $derivatives);
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}
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/**
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* @return \Generator<array>
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*/
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public function differentiateProvider() : Generator
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{
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yield [
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Matrix::quick([
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[1.0, -0.5, 0.0, 20.0, -10.0],
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]),
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Matrix::quick([
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[0.5, -0.3333333333333333, 0.0, 0.9523809523809523, -0.9090909090909091],
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]),
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[
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[0.25, 0.4444444444444444, 1.0, 0.0022675736961451248, 0.008264462809917356],
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],
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];
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yield [
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Matrix::quick([
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[-0.12, 0.31, -0.49],
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[0.99, 0.08, -0.03],
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[0.05, -0.52, 0.54],
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]),
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Matrix::quick([
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[-0.10714285714285712, 0.23664122137404578, -0.32885906040268453],
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[0.49748743718592964, 0.07407407407407407, -0.029126213592233007],
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[0.047619047619047616, -0.34210526315789475, 0.35064935064935066],
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]),
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[
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[0.7971938775510203, 0.5827166249053085, 0.4504301608035674],
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[0.252518875785965, 0.8573388203017832, 0.9425959091337544],
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[0.9070294784580498, 0.4328254847645429, 0.42165626581210996],
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],
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];
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}
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}
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