Code Coverage for /var/www/html/dev/src/phpOMS/Math/Statistic/Forecast/Regression/LogLevelRegression.php

1	<?php
2	/**
3	* Jingga
4	*
5	* PHP Version 8.1
6	*
7	* @package phpOMS\Math\Statistic\Forecast\Regression
8	* @copyright Dennis Eichhorn
9	* @license OMS License 2.0
10	* @version 1.0.0
11	* @link https://jingga.app
12	*/
13	declare(strict_types=1);
14
15	namespace phpOMS\Math\Statistic\Forecast\Regression;
16
17	use phpOMS\Math\Matrix\Exception\InvalidDimensionException;
18
19	/**
20	* Regression class.
21	*
22	* @package phpOMS\Math\Statistic\Forecast\Regression
23	* @license OMS License 2.0
24	* @link https://jingga.app
25	* @since 1.0.0
26	*/
27	final class LogLevelRegression extends RegressionAbstract
28	{
29	/**
30	* {@inheritdoc}
31	*
32	* @throws InvalidDimensionException
33	*/
34	public static function getRegression(array $x, array $y) : array
35	{
36	if (($c = \count($x)) !== \count($y)) {
37	throw new InvalidDimensionException($c . 'x' . \count($y));
38	}
39
40	for ($i = 0; $i < $c; ++$i) {
41	$y[$i] = \log($y[$i]);
42	}
43
44	return parent::getRegression($x, $y);
45	}
46
47	/**
48	* {@inheritdoc}
49	*/
50	public static function getSlope(float $b1, float $y, float $x) : float
51	{
52	return $b1 * $y;
53	}
54
55	/**
56	* {@inheritdoc}
57	*/
58	public static function getElasticity(float $b1, float $y, float $x) : float
59	{
60	return $b1 * $x;
61	}
62	}