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See Release Notes

  • Bug fixes for general core bugs in 4.0.x will end 8 May 2023 (12 months).
  • Bug fixes for security issues in 4.0.x will end 13 November 2023 (18 months).
  • PHP version: minimum PHP 7.3.0 Note: the minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is also supported.
   1  <?php
   2  
   3  declare(strict_types=1);
   4  
   5  namespace Phpml\NeuralNetwork\ActivationFunction;
   6  
   7  use Phpml\NeuralNetwork\ActivationFunction;
   8  
   9  class BinaryStep implements ActivationFunction
  10  {
  11      /**
  12       * @param float|int $value
  13       */
  14      public function compute($value): float
  15      {
  16          return $value >= 0 ? 1.0 : 0.0;
  17      }
  18  
  19      /**
  20       * @param float|int $value
  21       * @param float|int $computedvalue
  22       */
  23      public function differentiate($value, $computedvalue): float
  24      {
  25          if ($value === 0 || $value === 0.0) {
  26              return 1;
  27          }
  28  
  29          return 0;
  30      }
  31  }