Optimizer::setTheta() - Code Metrics - Inspection of "Add Optimizer tests and remove initialTheta (#252)" - php-ai/php-ml - Measure and Improve Code Quality continuously with Scrutinizer

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created 2018-03-04 21:44 UTC

Optimizer::setTheta() A

↳ Parent: Optimizer

Complexity

Conditions	2
Paths	2

Size

Total Lines	10
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	10
rs	9.4285
c	0
b	0
f	0
cc	2
eloc	5
nc	2
nop	1

<?php

declare(strict_types=1);

namespace Phpml\Helper\Optimizer;

use Closure;
use Phpml\Exception\InvalidArgumentException;

abstract class Optimizer
{
    /**
     * Unknown variables to be found
     *
     * @var array
     */
    protected $theta = [];

    /**
     * Number of dimensions
     *
     * @var int
     */
    protected $dimensions;

    /**
     * Inits a new instance of Optimizer for the given number of dimensions
     */
    public function __construct(int $dimensions)
    {
        $this->dimensions = $dimensions;

        // Inits the weights randomly
        $this->theta = [];
        for ($i = 0; $i < $this->dimensions; ++$i) {
            $this->theta[] = (random_int(0, PHP_INT_MAX) / PHP_INT_MAX) + 0.1;
        }
    }

    public function setTheta(array $theta)
    {
        if (count($theta) != $this->dimensions) {
            throw new InvalidArgumentException(sprintf('Number of values in the weights array should be %s', $this->dimensions));
        }

        $this->theta = $theta;

        return $this;
    }

    /**
     * Executes the optimization with the given samples & targets
     * and returns the weights
     */
    abstract public function runOptimization(array $samples, array $targets, Closure $gradientCb);
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace Phpml\Helper\Optimizer;
6
7			use Closure;
8			use Phpml\Exception\InvalidArgumentException;
9
10			abstract class Optimizer
11			{
12			/**
13			* Unknown variables to be found
14			*
15			* @var array
16			*/
17			protected $theta = [];
18
19			/**
20			* Number of dimensions
21			*
22			* @var int
23			*/
24			protected $dimensions;
25
26			/**
27			* Inits a new instance of Optimizer for the given number of dimensions
28			*/
29			public function __construct(int $dimensions)
30			{
31			$this->dimensions = $dimensions;
32
33			// Inits the weights randomly
34			$this->theta = [];
35			for ($i = 0; $i < $this->dimensions; ++$i) {
36			$this->theta[] = (random_int(0, PHP_INT_MAX) / PHP_INT_MAX) + 0.1;
37			}
38			}
39
40			public function setTheta(array $theta)
41			{
42			if (count($theta) != $this->dimensions) {
43			throw new InvalidArgumentException(sprintf('Number of values in the weights array should be %s', $this->dimensions));
44			}
45
46			$this->theta = $theta;
47
48			return $this;
49			}
50
51			/**
52			* Executes the optimization with the given samples & targets
53			* and returns the weights
54			*/
55			abstract public function runOptimization(array $samples, array $targets, Closure $gradientCb);
56			}
57

php-ai / php-ml

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Optimizer::setTheta() A

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