docs: protected double decisionFunctionR(int v)
      {
          double sum = 0;
          for (int i = 0; i < vecs.size(); i++)
              if (alphas[i] != alpha_s[i])//multipler would be zero
                  sum += (alphas[i] - alpha_s[i]) * kEval(v, i);
  
          return sum;
      }