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1 | <?php |
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2 | |||
3 | declare(strict_types=1); |
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4 | |||
5 | namespace Phpml\NeuralNetwork\Node; |
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6 | |||
7 | use Phpml\NeuralNetwork\ActivationFunction; |
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8 | use Phpml\NeuralNetwork\ActivationFunction\Sigmoid; |
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9 | use Phpml\NeuralNetwork\Node; |
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10 | use Phpml\NeuralNetwork\Node\Neuron\Synapse; |
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11 | |||
12 | class Neuron implements Node |
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13 | { |
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14 | /** |
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15 | * @var Synapse[] |
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16 | */ |
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17 | protected $synapses = []; |
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18 | |||
19 | /** |
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20 | * @var ActivationFunction |
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21 | */ |
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22 | protected $activationFunction; |
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23 | |||
24 | /** |
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25 | * @var float |
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26 | */ |
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27 | protected $output; |
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28 | |||
29 | public function __construct(?ActivationFunction $activationFunction = null) |
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30 | { |
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31 | $this->activationFunction = $activationFunction ?: new Sigmoid(); |
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32 | $this->synapses = []; |
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33 | $this->output = 0; |
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0 ignored issues
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34 | } |
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35 | |||
36 | public function addSynapse(Synapse $synapse): void |
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37 | { |
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38 | $this->synapses[] = $synapse; |
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39 | } |
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40 | |||
41 | /** |
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42 | * @return Synapse[] |
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43 | */ |
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44 | public function getSynapses() |
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45 | { |
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46 | return $this->synapses; |
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47 | } |
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48 | |||
49 | public function getOutput(): float |
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50 | { |
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51 | if ($this->output === 0) { |
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52 | $sum = 0; |
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53 | foreach ($this->synapses as $synapse) { |
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54 | $sum += $synapse->getOutput(); |
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55 | } |
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56 | |||
57 | $this->output = $this->activationFunction->compute($sum); |
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58 | } |
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59 | |||
60 | return $this->output; |
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61 | } |
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62 | |||
63 | public function reset(): void |
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64 | { |
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65 | $this->output = 0; |
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0 ignored issues
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The property
$output was declared of type double , but 0 is of type integer . Maybe add a type cast?
This check looks for assignments to scalar types that may be of the wrong type. To ensure the code behaves as expected, it may be a good idea to add an explicit type cast. $answer = 42;
$correct = false;
$correct = (bool) $answer;
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66 | } |
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67 | } |
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68 |
This check looks for assignments to scalar types that may be of the wrong type.
To ensure the code behaves as expected, it may be a good idea to add an explicit type cast.