FirstOrderCostFunction.h

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/*
 * Copyright (c) The Shogun Machine Learning Toolbox
 * Written (w) 2015 Wu Lin
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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#ifndef FIRSTORDERCOSTFUNCTION_H
#define FIRSTORDERCOSTFUNCTION_H
#include <shogun/lib/config.h>
#include <shogun/lib/SGVector.h>
namespace shogun
{
class FirstOrderCostFunction
{
public:
    virtual float64_t get_cost()=0;
    virtual SGVector<float64_t> obtain_variable_reference()=0;
    virtual SGVector<float64_t> get_gradient()=0;
};

}

#endif