php-ml/tests/FeatureUnionTest.php

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2019-05-14 19:26:25 +00:00
<?php
declare(strict_types=1);
namespace Phpml\Tests;
use Phpml\Exception\InvalidArgumentException;
use Phpml\FeatureUnion;
use Phpml\Pipeline;
use Phpml\Preprocessing\ColumnFilter;
use Phpml\Preprocessing\Imputer;
use Phpml\Preprocessing\Imputer\Strategy\MeanStrategy;
use Phpml\Preprocessing\LabelEncoder;
use Phpml\Preprocessing\LambdaTransformer;
use Phpml\Preprocessing\NumberConverter;
use PHPUnit\Framework\TestCase;
final class FeatureUnionTest extends TestCase
{
public function testFitAndTransform(): void
{
$columns = ['age', 'income', 'sex'];
$samples = [
['23', '100000', 'male'],
['23', '200000', 'female'],
['43', '150000', 'female'],
['33', 'n/a', 'male'],
];
$targets = ['1', '2', '1', '3'];
$union = new FeatureUnion([
new Pipeline([
new ColumnFilter($columns, ['sex']),
new LambdaTransformer(function (array $sample) {
return $sample[0];
}),
new LabelEncoder(),
]),
new Pipeline([
new ColumnFilter($columns, ['age', 'income']),
new NumberConverter(true),
new Imputer(null, new MeanStrategy(), Imputer::AXIS_COLUMN),
]),
]);
$union->fitAndTransform($samples, $targets);
self::assertEquals([
[0, 23.0, 100000.0],
[1, 23.0, 200000.0],
[1, 43.0, 150000.0],
[0, 33.0, 150000.0],
], $samples);
self::assertEquals([1, 2, 1, 3], $targets);
}
public function testFitAndTransformSeparate(): void
{
$columns = ['age', 'income', 'sex'];
$trainSamples = [
['23', '100000', 'male'],
['23', '200000', 'female'],
['43', '150000', 'female'],
['33', 'n/a', 'male'],
];
$testSamples = [
['43', '500000', 'female'],
['13', 'n/a', 'male'],
['53', 'n/a', 'male'],
['43', 'n/a', 'female'],
];
$union = new FeatureUnion([
new Pipeline([
new ColumnFilter($columns, ['sex']),
new LambdaTransformer(function (array $sample) {
return $sample[0];
}),
new LabelEncoder(),
]),
new Pipeline([
new ColumnFilter($columns, ['age', 'income']),
new NumberConverter(),
new Imputer(null, new MeanStrategy(), Imputer::AXIS_COLUMN),
]),
]);
$union->fit($trainSamples);
$union->transform($testSamples);
self::assertEquals([
[1, 43.0, 500000.0],
[0, 13.0, 150000.0],
[0, 53.0, 150000.0],
[1, 43.0, 150000.0],
], $testSamples);
}
public function testNotAllowForEmptyPipelines(): void
{
$this->expectException(InvalidArgumentException::class);
new FeatureUnion([]);
}
}