Class SVC_Q

ml/src/svm.cpp:1444–1498

//

class SVC_Q : public Kernel {

public:
  SVC_Q(const svm_problem& prob, const svm_parameter& param, const schar* y_)
  : Kernel(prob.l, prob.x, param)
  {
    clone(y, y_, prob.l);
    cache = new Cache(prob.l, static_cast<long int>(param.cache_size * (1 << 20)));
    QD = new double[prob.l];

    for (int i = 0; i < prob.l; i++)
      QD[i] = (this->*kernel_function)(i, i);
  }

  Qfloat*
  get_Q(int i, int len) const override
  {
    Qfloat* data;
    int start;

    if ((start = cache->get_data(i, &data, len)) < len) {
      for (int j = start; j < len; j++)
        data[j] = static_cast<Qfloat>(y[i] * y[j] * (this->*kernel_function)(i, j));
    }

    return data;
  }

  double*
  get_QD() const override
  {
    return QD;
  }

  void
  swap_index(int i, int j) const override
  {
    cache->swap_index(i, j);
    Kernel::swap_index(i, j);
    swap(y[i], y[j]);
    swap(QD[i], QD[j]);
  }

  ~SVC_Q() override
  {
    delete[] y;
    delete cache;
    delete[] QD;
  }

private:
  schar* y;
  Cache* cache;
  double* QD;
};

class ONE_CLASS_Q : public Kernel {