binary_log_loss.hpp

Go to the documentation of this file.

#ifndef STAN__MATH__FUNCTIONS__BINARY_LOG_LOSS_HPP
#define STAN__MATH__FUNCTIONS__BINARY_LOG_LOSS_HPP

#include <boost/math/tools/promotion.hpp>

namespace stan {
  namespace math {

    template <typename T>
    inline typename boost::math::tools::promote_args<T>::type
    binary_log_loss(const int y, const T y_hat) {
      using std::log;
      return -log(y ? y_hat : (1.0 - y_hat));
    }

  }
}

#endif