Phpml\NeuralNetwork\Node\Synapse

Complexity

Total Complexity

8

Size/Duplication

Total Lines	62
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Importance

Changes

0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	2
A	generateRandomWeight()	0	4	2
A	getOutput()	0	4	1
A	changeWeight()	0	4	1
A	getWeight()	0	4	1
A	getNode()	0	4	1

<?php

declare (strict_types = 1);

namespace Phpml\NeuralNetwork\Node;

use Phpml\NeuralNetwork\Node;

class Synapse implements Node
{
    /**
     * @var float
     */
    protected $weight;

    /**
     * @var Node
     */
    protected $node;

    /**
     * @param Node       $node
     * @param float|null $weight
     */
    public function __construct(Node $node, float $weight = null)
    {
        $this->node = $node;
        $this->weight = $weight ?: $this->generateRandomWeight();
    }

    /**
     * @return float
     */
    protected function generateRandomWeight(): float
    {
        return 1 / rand(5, 25) * (rand(0, 1) ? -1 : 1);
    }

    /**
     * @return float
     */
    public function getOutput(): float
    {
        return $this->weight * $this->node->getOutput();
    }

    /**
     * @param float $delta
     */
    public function changeWeight($delta)
    {
        $this->weight += $delta;
    }

    /**
     * @return float
     */
    public function getWeight()
    {
        return $this->weight;
    }

    /**
     * @return Node
     */
    public function getNode()
    {
        return $this->node;
    }
}