NumPHP\Core\NumPHP::linspace PHP Метод

    public static function linspace($low, $high, $number)
    {
        if ($number < 0) {
            throw new InvalidArgumentException('Number has to be a positive value');
        }
        $data = [];
        switch ($number) {
            case 0:
                break;
            case 1:
                $data = [$low];
                break;
            default:
                $step = ($high - $low) / ($number - 1);
                $sum = $low;
                for ($i = 0; $i < $number; $i++) {
                    $data[] = $sum;
                    $sum += $step;
                }
                break;
        }
        return new NumArray($data);
    }

 /**
  * Test if InvalidArgumentException will be thrown, when using NumPHP::linspace
  * with negative `$number`
  *
  * @expectedException        \NumPHP\Core\Exception\InvalidArgumentException
  * @expectedExceptionMessage Number has to be a positive value
  */
 public function testLinspaceInvalidArgumentException()
 {
     NumPHP::linspace(1.5, 4.5, -1);
 }