Selling Icecreams

FAQ

For information about dat-files have a view to the FAQ page.

Training

<?php
require_once '../ANN/Loader.php';

use ANN\Network;
use ANN\InputValue;
use ANN\OutputValue;
use ANN\Values;

try {
    $objNetwork = Network::loadFromFile('icecreams.dat');
} catch (Exception $e) {
    $objNetwork = new Network(2, 5, 1);

    $objTemperature = new InputValue(- 15, 50); // Temperature in Celsius

    $objTemperature->saveToFile('input_temperature.dat');

    $objHumidity = new InputValue(0, 100); // Humidity percentage

    $objHumidity->saveToFile('input_humidity.dat');

    $objIcecream = new OutputValue(0, 300); // Quantity of sold ice-creams

    $objIcecream->saveToFile('output_quantity.dat');

    $objValues = new Values();

    $objValues->train()
        ->input($objTemperature->getInputValue(20), $objHumidity->getInputValue(10))
        ->output($objIcecream->getOutputValue(20))
        ->input($objTemperature->getInputValue(30), $objHumidity->getInputValue(40))
        ->output($objIcecream->getOutputValue(90))
        ->input($objTemperature->getInputValue(32), $objHumidity->getInputValue(30))
        ->output($objIcecream->getOutputValue(70))
        ->input($objTemperature->getInputValue(33), $objHumidity->getInputValue(20))
        ->output($objIcecream->getOutputValue(75));

    $objValues->saveToFile('values_icecreams.dat');
}

try {
    $objValues = Values::loadFromFile('values_icecreams.dat');
} catch (Exception $e) {
    die('Loading of values failed');
}

$objNetwork->setValues($objValues);

$boolTrained = $objNetwork->train();

print ($boolTrained) ? 'Network trained' : 'Network not trained completely. Please re-run the script';

$objNetwork->saveToFile('icecreams.dat');

Using trained network

require_once 'ANN/Loader.php';

use ANN\Network;
use ANN\InputValue;
use ANN\OutputValue;
use ANN\Values;

try
{
  $objNetwork = Network::loadFromFile('icecreams.dat');
}
catch(Exception $e)
{
  die('Network not found');
}

try
{
  $objTemperature = InputValue::loadFromFile('input_temperature.dat'); // Temperature in Celsius

  $objHumidity    = InputValue::loadFromFile('input_humidity.dat');    // Humidity percentage

  $objIcecream    = OutputValue::loadFromFile('output_quantity.dat');  // Quantity of sold ice-creams
}
catch(Exception $e)
{
  die('Error loading value objects');
}

try
{
  $objValues = Values::loadFromFile('values_icecreams.dat');
}
catch(Exception $e)
{
  die('Loading of values failed');
}

$objValues->input( // input values appending the loaded ones
                 $objTemperature->getInputValue(17),
                 $objHumidity->getInputValue(12)
                 )
          ->input(
                 $objTemperature->getInputValue(31),
                 $objHumidity->getInputValue(42)
                 )
          ->input(
                 $objTemperature->getInputValue(31),
                 $objHumidity->getInputValue(34)
                 )
          ->input(
                 $objTemperature->getInputValue(34),
                 $objHumidity->getInputValue(21)
                 );

$objNetwork->setValues($objValues);

$arrOutputs = $objNetwork->getOutputs();

foreach($arrOutputs as $arrOutput)
  foreach($arrOutput as $floatOutput)
    print $objIcecream->getRealOutputValue($floatOutput). '<br />';