Phpml\Math\Kernel\RBF::compute PHP Метод

    public function compute($a, $b)
    {
        $score = 2 * Product::scalar($a, $b);
        $squares = Product::scalar($a, $a) + Product::scalar($b, $b);
        $result = exp(-$this->gamma * ($squares - $score));
        return $result;
    }

 public function testComputeRBFKernelFunction()
 {
     $rbf = new RBF($gamma = 0.001);
     $this->assertEquals(1, $rbf->compute([1, 2], [1, 2]));
     $this->assertEquals(0.97336, $rbf->compute([1, 2, 3], [4, 5, 6]), '', $delta = 0.0001);
     $this->assertEquals(0.00011, $rbf->compute([4, 5], [1, 100]), '', $delta = 0.0001);
     $rbf = new RBF($gamma = 0.2);
     $this->assertEquals(1, $rbf->compute([1, 2], [1, 2]));
     $this->assertEquals(0.00451, $rbf->compute([1, 2, 3], [4, 5, 6]), '', $delta = 0.0001);
     $this->assertEquals(0, $rbf->compute([4, 5], [1, 100]));
 }