/usr/include/shogun/evaluation/MeanSquaredLogError.h is in libshogun-dev 3.1.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | /*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Written (W) 2012 Heiko Strathmann
* Copyright (C) 2012 Berlin Institute of Technology and Max-Planck-Society
*/
#ifndef __MEANSQUAREDLOGERROR__
#define __MEANSQUAREDLOGERROR__
#include <shogun/evaluation/Evaluation.h>
#include <shogun/labels/Labels.h>
namespace shogun
{
class CLabels;
/** @brief Class CMeanSquaredLogError
* used to compute an error of regression model.
*
* Formally, for real labels \f$ L,R, |L|=|R|, L_i, R_i > -1\f$ mean squared
* log error is estimated as
*
* \f[
* \sqrt{\frac{1}{|L|} \sum_{i=1}^{|L|} (\log{L_i+1} - \log{R_i+1})^2}
* \f]
*
*/
class CMeanSquaredLogError: public CEvaluation
{
public:
/** constructor */
CMeanSquaredLogError() : CEvaluation() {};
/** destructor */
virtual ~CMeanSquaredLogError() {};
/** evaluate mean squared log error
* @param predicted labels for evaluating
* @param ground_truth labels assumed to be correct
* @return mean squared error
*/
virtual float64_t evaluate(CLabels* predicted, CLabels* ground_truth);
inline EEvaluationDirection get_evaluation_direction() const
{
return ED_MINIMIZE;
}
/** get name */
virtual const char* get_name() const { return "MeanSquaredLogError"; }
};
}
#endif /* __MEANSQUAREDLOGERROR__ */
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