|
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
|
|
|
* @var Pipeline[] |
|
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
|
|
|
} |
|
73
|
|
|
|
php-ai /
php-ml
