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59 lines
1.2 KiB
PHP
59 lines
1.2 KiB
PHP
<?php
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declare (strict_types = 1);
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namespace tests\Preprocessing;
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use Phpml\Preprocessing\Normalizer;
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class NormalizerTest extends \PHPUnit_Framework_TestCase
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{
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/**
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* @expectedException \Phpml\Exception\NormalizerException
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*/
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public function testThrowExceptionOnInvalidNorm()
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{
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new Normalizer(99);
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}
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public function testNormalizeSamplesWithL2Norm()
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{
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$samples = [
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[1, -1, 2],
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[2, 0, 0],
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[0, 1, -1],
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];
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$normalized = [
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[0.4, -0.4, 0.81],
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[1.0, 0.0, 0.0],
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[0.0, 0.7, -0.7],
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];
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$normalizer = new Normalizer();
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$normalizer->transform($samples);
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$this->assertEquals($normalized, $samples, '', $delta = 0.01);
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}
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public function testNormalizeSamplesWithL1Norm()
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{
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$samples = [
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[1, -1, 2],
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[2, 0, 0],
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[0, 1, -1],
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];
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$normalized = [
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[0.25, -0.25, 0.5],
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[1.0, 0.0, 0.0],
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[0.0, 0.5, -0.5],
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];
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$normalizer = new Normalizer(Normalizer::NORM_L1);
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$normalizer->transform($samples);
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$this->assertEquals($normalized, $samples, '', $delta = 0.01);
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}
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}
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