Optimizer::__construct() - Code Metrics - Inspection of "LogisticRegression classifier & Optimization metho..." - php-ai/php-ml - Measure and Improve Code Quality continuously with Scrutinizer

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by Arkadiusz

created 2017-03-27 21:46 UTC

Optimizer::__construct() 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;

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
     *
     * @param int $dimensions
     */
    public function __construct(int $dimensions)
    {
        $this->dimensions = $dimensions;

        // Inits the weights randomly
        $this->theta = [];
        for ($i=0; $i < $this->dimensions; $i++) {
            $this->theta[] = rand() / (float) getrandmax();
        }
    }

    /**
     * Sets the weights manually
     *
     * @param array $theta
     */
    public function setInitialTheta(array $theta)
    {
        if (count($theta) != $this->dimensions) {
            throw new \Exception("Number of values in the weights array should be $this->dimensions");
        }

        $this->theta = $theta;

        return $this;
    }

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


1			<?php
2
3			declare(strict_types=1);
4
5			namespace Phpml\Helper\Optimizer;
6
7			abstract class Optimizer
8			{
9			/**
10			* Unknown variables to be found
11			*
12			* @var array
13			*/
14			protected $theta;
15
16			/**
17			* Number of dimensions
18			*
19			* @var int
20			*/
21			protected $dimensions;
22
23			/**
24			* Inits a new instance of Optimizer for the given number of dimensions
25			*
26			* @param int $dimensions
27			*/
28			public function __construct(int $dimensions)
29			{
30			$this->dimensions = $dimensions;
31
32			// Inits the weights randomly
33			$this->theta = [];
34			for ($i=0; $i < $this->dimensions; $i++) {
35			$this->theta[] = rand() / (float) getrandmax();
36			}
37			}
38
39			/**
40			* Sets the weights manually
41			*
42			* @param array $theta
43			*/
44			public function setInitialTheta(array $theta)
45			{
46			if (count($theta) != $this->dimensions) {
47			throw new \Exception("Number of values in the weights array should be $this->dimensions");
48			}
49
50			$this->theta = $theta;
51
52			return $this;
53			}
54
55			/**
56			* Executes the optimization with the given samples & targets
57			* and returns the weights
58			*
59			*/
60			abstract protected function runOptimization(array $samples, array $targets, \Closure $gradientCb);
61			}
62

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Optimizer::__construct() A

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