Function sigmoid_predict

ml/src/svm.cpp:2102–2111

}

static double
sigmoid_predict(double decision_value, double A, double B)
{
  double fApB = decision_value * A + B;
  // 1-p used later; avoid catastrophic cancellation

  if (fApB >= 0)
    return std::exp(-fApB) / (1.0 + std::exp(-fApB));
  return 1.0 / (1 + std::exp(fApB));
}

// Method 2 from the multiclass_prob paper by Wu, Lin, and Weng
static void