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* travis: move coveralls here, decouple from package * composer: use PSR4 * phpunit: simpler config * travis: add ecs run * composer: add ecs dev * use standard vendor/bin directory for dependency bins, confuses with local bins and require gitignore handling * ecs: add PSR2 * [cs] PSR2 spacing fixes * [cs] PSR2 class name fix * [cs] PHP7 fixes - return semicolon spaces, old rand functions, typehints * [cs] fix less strict typehints * fix typehints to make tests pass * ecs: ignore typehint-less elements * [cs] standardize arrays * [cs] standardize docblock, remove unused comments * [cs] use self where possible * [cs] sort class elements, from public to private * [cs] do not use yoda (found less yoda-cases, than non-yoda) * space * [cs] do not assign in condition * [cs] use namespace imports if possible * [cs] use ::class over strings * [cs] fix defaults for arrays properties, properties and constants single spacing * cleanup ecs comments * [cs] use item per line in multi-items array * missing line * misc * rebase
66 lines
2.1 KiB
PHP
66 lines
2.1 KiB
PHP
<?php
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declare(strict_types=1);
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namespace tests\Phpml\DimensionReduction;
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use Phpml\Dataset\Demo\IrisDataset;
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use Phpml\DimensionReduction\LDA;
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use PHPUnit\Framework\TestCase;
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class LDATest extends TestCase
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{
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public function testLDA(): void
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{
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// Acceptable error
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$epsilon = 0.001;
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// IRIS dataset will be used to train LDA
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$dataset = new IrisDataset();
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$lda = new LDA(null, 2);
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$transformed = $lda->fit($dataset->getSamples(), $dataset->getTargets());
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// Some samples of the Iris data will be checked manually
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// First 3 and last 3 rows from the original dataset
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$data = [
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[5.1, 3.5, 1.4, 0.2],
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[4.9, 3.0, 1.4, 0.2],
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[4.7, 3.2, 1.3, 0.2],
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[6.5, 3.0, 5.2, 2.0],
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[6.2, 3.4, 5.4, 2.3],
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[5.9, 3.0, 5.1, 1.8],
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];
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$transformed2 = [
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[-1.4922092756753, 1.9047102045574],
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[-1.2576556684358, 1.608414450935],
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[-1.3487505965419, 1.749846351699],
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[1.7759343101456, 2.0371552314006],
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[2.0059819019159, 2.4493123003226],
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[1.701474913008, 1.9037880473772],
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];
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$control = [];
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$control = array_merge($control, array_slice($transformed, 0, 3));
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$control = array_merge($control, array_slice($transformed, -3));
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$check = function ($row1, $row2) use ($epsilon): void {
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// Due to the fact that the sign of values can be flipped
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// during the calculation of eigenValues, we have to compare
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// absolute value of the values
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$row1 = array_map('abs', $row1);
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$row2 = array_map('abs', $row2);
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$this->assertEquals($row1, $row2, '', $epsilon);
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};
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array_map($check, $control, $transformed2);
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// Fitted LDA object should be able to return same values again
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// for each projected row
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foreach ($data as $i => $row) {
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$newRow = [$transformed2[$i]];
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$newRow2 = $lda->transform($row);
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array_map($check, $newRow, $newRow2);
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}
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}
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}
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