98 lines
2.5 KiB
PHP
98 lines
2.5 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Phpml\Tests\Metric;
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use Phpml\Exception\InvalidArgumentException;
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use Phpml\Metric\Regression;
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use PHPUnit\Framework\TestCase;
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final class RegressionTest extends TestCase
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{
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public function testMeanSquaredError(): void
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{
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self::assertEquals(6.08, Regression::meanSquaredError(
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[41, 45, 49, 47, 44],
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[43.6, 44.4, 45.2, 46, 46.8]
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));
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self::assertEquals(0.375, Regression::meanSquaredError(
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[3, -0.5, 2, 7],
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[2.5, 0.0, 2, 8]
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));
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}
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public function testR2Score(): void
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{
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self::assertEqualsWithDelta(0.1739, Regression::r2Score(
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[41, 45, 49, 47, 44],
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[43.6, 44.4, 45.2, 46, 46.8]
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), 0.0001);
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}
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public function testMaxError(): void
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{
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self::assertEquals(1, Regression::maxError([3, 2, 7, 1], [4, 2, 7, 1]));
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// test absolute value
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self::assertEquals(5, Regression::maxError([-10, 2, 7, 1], [-5, 2, 7, 1]));
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}
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public function testMeanAbsoluteError(): void
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{
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self::assertEquals(0.5, Regression::meanAbsoluteError([3, -0.5, 2, 7], [2.5, 0.0, 2, 8]));
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}
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public function testMeanSquaredLogarithmicError(): void
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{
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self::assertEqualsWithDelta(0.039, Regression::meanSquaredLogarithmicError(
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[3, 5, 2.5, 7],
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[2.5, 5, 4, 8]
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), 0.001);
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}
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public function testMedianAbsoluteError(): void
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{
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self::assertEquals(0.5, Regression::medianAbsoluteError(
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[3, -0.5, 2, 7],
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[2.5, 0.0, 2, 8]
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));
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}
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public function testMeanSquaredErrorInvalidCount(): void
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{
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self::expectException(InvalidArgumentException::class);
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Regression::meanSquaredError([1], [1, 2]);
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}
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public function testR2ScoreInvalidCount(): void
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{
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self::expectException(InvalidArgumentException::class);
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Regression::r2Score([1], [1, 2]);
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}
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public function testMaxErrorInvalidCount(): void
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{
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self::expectException(InvalidArgumentException::class);
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Regression::r2Score([1], [1, 2]);
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}
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public function tesMeanAbsoluteErrorInvalidCount(): void
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{
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self::expectException(InvalidArgumentException::class);
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Regression::meanAbsoluteError([1], [1, 2]);
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}
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public function tesMediaAbsoluteErrorInvalidCount(): void
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{
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self::expectException(InvalidArgumentException::class);
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Regression::medianAbsoluteError([1], [1, 2]);
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}
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}
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