/**
* Set the main flags to app
*/
public function setUp()
{
$this->_app = new App();
Net::setDirection(Net::DIRECT);
Net::setMode(Net::TEACHER_MODE);
Net::setDebugFlag(false);
//disable output to console
}
/**
* @param array $signals
* @param int $direction
* @return array
*/
public function prepareNeuronToCalculation($signals = array(), $direction)
{
$assoc = Factory::neuron(Factory::ASSOC, 0);
$react = Factory::neuron(Factory::REACT, 0);
//Adding Signals
foreach ($signals as $signal) {
$assoc->addSignal($signal);
$react->addSignal($signal);
}
$this->_addLayoutToNeuron($assoc);
$this->_addLayoutToNeuron($react);
//Calculation
Net::setDirection($direction);
return array(Factory::ASSOC => $assoc, Factory::REACT => $react);
}
/**
* @throws \Exception
* @return bool
*/
public function calculate()
{
//Calculating value
$_sum = array_sum($this->getSignals());
$_sum += $this->getLayout()->getOffset();
$this->_value = $this->_binarSigmoid($_sum);
if (Net::isTeacherMode()) {
Net::setDirection(Net::REVERSE);
$_value = ($this->_teacherValue - $this->_value) * $this->_diffBinarSigmoid($_sum);
//new value will be mistake
if (Net::isDebugEnabled()) {
//Print value and teacher value/
var_dump("Summ: {$_value}. Teacher : " . $this->_teacherValue . ". Value: " . $this->_value);
}
$this->setValue($_value);
} else {
$this->getLayout()->compare($this);
//add to lead neurons if this neuron has the max value
}
return true;
}
/**
* Test Weight Correction after sending signal. Direction Should be always Reverse
* @param $signal
* @param $weight
* @dataProvider prepareSendingData
* @depends testDirectSend
* @depends testReverseSend
*/
public function testWeightCorrection($signal, $weight)
{
Net::setDirection(Net::REVERSE);
//signal propagation
$this->_to->setValue($signal);
$this->_from->setValue($this->_oldValue);
$this->_relation->setWeight($weight);
$this->_relation->send($this->_to);
//Test whether weight correction is null or no
$this->assertNotEquals($weight, $this->getWeightFromRelation($this->_relation), "Back Propagation Stuck");
}
public function rewind()
{
//Start From the beginning
$this->_level = 0;
Net::setDirection(Net::DIRECT);
}
/**
* @throws \Exception
*/
public function calculate()
{
Net::setDirection(Net::DIRECT);
$this->setValue($this->_value);
//do nothing
}
