| 1 |
efrain |
1 |
<?php
|
|
|
2 |
|
|
|
3 |
declare(strict_types=1);
|
|
|
4 |
|
|
|
5 |
namespace Phpml;
|
|
|
6 |
|
|
|
7 |
use Phpml\Exception\InvalidArgumentException;
|
|
|
8 |
|
|
|
9 |
final class FeatureUnion implements Transformer
|
|
|
10 |
{
|
|
|
11 |
/**
|
|
|
12 |
* @var Pipeline[]
|
|
|
13 |
*/
|
|
|
14 |
private $pipelines = [];
|
|
|
15 |
|
|
|
16 |
/**
|
|
|
17 |
* @param Pipeline[] $pipelines
|
|
|
18 |
*/
|
|
|
19 |
public function __construct(array $pipelines)
|
|
|
20 |
{
|
|
|
21 |
if ($pipelines === []) {
|
|
|
22 |
throw new InvalidArgumentException('At least one pipeline is required');
|
|
|
23 |
}
|
|
|
24 |
|
|
|
25 |
$this->pipelines = array_map(static function (Pipeline $pipeline): Pipeline {
|
|
|
26 |
return $pipeline;
|
|
|
27 |
}, $pipelines);
|
|
|
28 |
}
|
|
|
29 |
|
|
|
30 |
public function fit(array $samples, ?array $targets = null): void
|
|
|
31 |
{
|
|
|
32 |
$originSamples = $samples;
|
|
|
33 |
foreach ($this->pipelines as $pipeline) {
|
|
|
34 |
foreach ($pipeline->getTransformers() as $transformer) {
|
|
|
35 |
$transformer->fit($samples, $targets);
|
|
|
36 |
$transformer->transform($samples, $targets);
|
|
|
37 |
}
|
|
|
38 |
$samples = $originSamples;
|
|
|
39 |
}
|
|
|
40 |
}
|
|
|
41 |
|
|
|
42 |
public function transform(array &$samples, ?array &$targets = null): void
|
|
|
43 |
{
|
|
|
44 |
$this->transformSamples($samples, $targets);
|
|
|
45 |
}
|
|
|
46 |
|
|
|
47 |
public function fitAndTransform(array &$samples, ?array &$targets = null): void
|
|
|
48 |
{
|
|
|
49 |
$this->transformSamples($samples, $targets, true);
|
|
|
50 |
}
|
|
|
51 |
|
|
|
52 |
private function transformSamples(array &$samples, ?array &$targets = null, bool $fit = false): void
|
|
|
53 |
{
|
|
|
54 |
$union = [];
|
|
|
55 |
$originSamples = $samples;
|
|
|
56 |
foreach ($this->pipelines as $pipeline) {
|
|
|
57 |
foreach ($pipeline->getTransformers() as $transformer) {
|
|
|
58 |
if ($fit) {
|
|
|
59 |
$transformer->fit($samples, $targets);
|
|
|
60 |
}
|
|
|
61 |
$transformer->transform($samples, $targets);
|
|
|
62 |
}
|
|
|
63 |
|
|
|
64 |
foreach ($samples as $index => $sample) {
|
|
|
65 |
$union[$index] = array_merge($union[$index] ?? [], is_array($sample) ? $sample : [$sample]);
|
|
|
66 |
}
|
|
|
67 |
$samples = $originSamples;
|
|
|
68 |
}
|
|
|
69 |
|
|
|
70 |
$samples = $union;
|
|
|
71 |
}
|
|
|
72 |
}
|