private double Pearson(ObiektDecyzyjny a, ObiektDecyzyjny b)
        {
            double x1 = 0.00;
            double y1 = 0.00;
            for (var i = 0; i < a.deskryptory.Count(); i++)
            {
                x1 += a.deskryptory[i].wartosc;
                y1 += b.deskryptory[i].wartosc;
            }
            x1 = x1 / a.deskryptory.Count();
            y1 = y1 / b.deskryptory.Count();

            double x2 = 0.00;
            double y2 = 0.00;
            for (var i = 0; i < a.deskryptory.Count(); i++)
            {
                x2 += Math.Pow(a.deskryptory[i].wartosc - x1, 2);
                y2 += Math.Pow(b.deskryptory[i].wartosc - y1, 2);
            }
            x2 = Math.Sqrt(x2 / a.deskryptory.Count());
            y2 = Math.Sqrt(y2 / b.deskryptory.Count());
            double r = 0.00;
            for (var i = 0; i < a.deskryptory.Count(); i++)
            {
                r += ((a.deskryptory[i].wartosc - x1) / x2) * ((b.deskryptory[i].wartosc - y1) / y2);
            }
            r = r / a.deskryptory.Count();
            double d = 0;
            d = 1 - (Math.Abs(r));
            return d;
        }