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Add activationFunction parameter for Perceptron and Layer

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This commit is contained in:
Arkadiusz Kondas 2016-08-11 13:21:22 +02:00
parent c506a84164
commit 2412f15923
2 changed files with 29 additions and 10 deletions
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24
src/Phpml/NeuralNetwork/Layer.php
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@ -15,22 +15,38 @@ class Layer
private $nodes = [];
/**
* @param int $nodesNumber
* @param string $nodeClass
* @param int $nodesNumber
* @param string $nodeClass
* @param ActivationFunction|null $activationFunction
*
* @throws InvalidArgumentException
*/
public function __construct(int $nodesNumber = 0, string $nodeClass = Neuron::class)
public function __construct(int $nodesNumber = 0, string $nodeClass = Neuron::class, ActivationFunction $activationFunction = null)
{
if (!in_array(Node::class, class_implements($nodeClass))) {
throw InvalidArgumentException::invalidLayerNodeClass();
}
for ($i = 0; $i < $nodesNumber; ++$i) {
$this->nodes[] = new $nodeClass();
$this->nodes[] = $this->createNode($nodeClass, $activationFunction);
}
}
/**
* @param string $nodeClass
* @param ActivationFunction|null $activationFunction
*
* @return Neuron
*/
private function createNode(string $nodeClass, ActivationFunction $activationFunction = null)
{
if (Neuron::class == $nodeClass) {
return new Neuron($activationFunction);
}
return new $nodeClass();
}
/**
* @param Node $node
*/

15
src/Phpml/NeuralNetwork/Network/MultilayerPerceptron.php
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@ -5,6 +5,7 @@ declare (strict_types = 1);
namespace Phpml\NeuralNetwork\Network;
use Phpml\Exception\InvalidArgumentException;
use Phpml\NeuralNetwork\ActivationFunction;
use Phpml\NeuralNetwork\Layer;
use Phpml\NeuralNetwork\Node\Bias;
use Phpml\NeuralNetwork\Node\Input;
@ -14,18 +15,19 @@ use Phpml\NeuralNetwork\Node\Neuron\Synapse;
class MultilayerPerceptron extends LayeredNetwork
{
/**
* @param array $layers
* @param array $layers
* @param ActivationFunction|null $activationFunction
*
* @throws InvalidArgumentException
*/
public function __construct(array $layers)
public function __construct(array $layers, ActivationFunction $activationFunction = null)
{
if (count($layers) < 2) {
throw InvalidArgumentException::invalidLayersNumber();
}
$this->addInputLayer(array_shift($layers));
$this->addNeuronLayers($layers);
$this->addNeuronLayers($layers, $activationFunction);
$this->addBiasNodes();
$this->generateSynapses();
}
@ -39,12 +41,13 @@ class MultilayerPerceptron extends LayeredNetwork
}
/**
* @param array $layers
* @param array $layers
* @param ActivationFunction|null $activationFunction
*/
private function addNeuronLayers(array $layers)
private function addNeuronLayers(array $layers, ActivationFunction $activationFunction = null)
{
foreach ($layers as $neurons) {
$this->addLayer(new Layer($neurons, Neuron::class));
$this->addLayer(new Layer($neurons, Neuron::class, $activationFunction));
}
}