/**
* @throws \Exception
*/
public function calculate()
{
$_sum = array_sum($this->getSignals());
switch (Net::getDirection()) {
case Net::DIRECT:
$this->setValue($this->_binarSigmoid($_sum) + $this->getLayout()->getOffset());
break;
case Net::REVERSE:
$this->setValue($_sum * $this->_diffBinarSigmoid($this->_value));
}
}
/**
* @param $initialValues
* @param $teacherValues
* @dataProvider prepareValues
*/
public function testIterations($initialValues, $teacherValues)
{
$this->_layoutCollection = $this->initAllLayouts(self::LAYOUT_NUMBER);
Net::setIterationsCount(0);
//Preparing collection with neurons
$this->initNeuronsInLayoutCollection($this->_layoutCollection, $initialValues, $teacherValues);
$_iterations = array();
foreach ($this->_layoutCollection as $layout) {
array_push($_iterations, $layout->getLevel());
}
$this->assertSame($this->_iterationArray, $_iterations);
}
/**
* @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);
}
/**
* Full Test: check whether back propagation was successful
* @throws \Exception
*/
public function testAbsolute()
{
$_values = $this->parseYaml($this->_getCurrentFolder(__DIR__, "absolute", "absolute.yml"));
$_values = $this->prepareValues($_values);
$this->initCounts($this->_app, $_values);
//Initializing and start
$this->_app->init($_values);
$this->_app->start();
Net::setMode(Net::PRODUCTION_MODE);
$this->_app->start();
//run app with same values but in production mode
$lastLayout = $this->_app->getLayoutCollection()->getLastLayout();
/** @var NeuronNet\Neuron\React $winner */
$winner = $lastLayout->seek($this->_app->getWinner());
//Compare standard teacher value with winner`s teacher value
$this->assertEquals(self::WINNER_TEACHER_VALUE, $winner->getTeacherValue());
}
/**
* @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 setUp()
{
Net::setMode(Net::TEACHER_MODE);
}
/**
* Check what mode we have -> iterate only in one side when we are using production mode, and use back propagation if we have also mistake flow
* @return bool
*/
public function valid()
{
if (!Net::validateIteration()) {
return false;
}
if (!Net::isTeacherMode()) {
return $this->_level != $this->count();
} else {
//back propaganation
return !($this->_level == $this->count() && !Net::isMistakeFlow() && ($this->_level == 0 && Net::isMistakeFlow()));
}
}
/**
* @throws \Exception
*/
public function calculate()
{
Net::setDirection(Net::DIRECT);
$this->setValue($this->_value);
//do nothing
}
