DirectNegativeCostFunction.h

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// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 1998 Pascal Vincent
// Copyright (C) 1999-2002 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
// Copyright (C) 2001-2002 Nicolas Chapados, Ichiro Takeuchi, Jean-Sebastien Senecal
// Copyright (C) 2002 Xiangdong Wang, Christian Dorion

// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
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//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
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/* *******************************************************      
   * $Id: DirectNegativeCostFunction.h,v 1.4 2004/04/07 23:15:17 morinf Exp $
   * This file is part of the PLearn library.
   ******************************************************* */

#ifndef DirectNegativeCostFunction_INC
#define DirectNegativeCostFunction_INC

#include "Kernel.h"

namespace PLearn {
using namespace std;

class DirectNegativeCostFunction: public Kernel
{
  typedef Kernel inherited;
                
public:
    DirectNegativeCostFunction()
        {}

    PLEARN_DECLARE_OBJECT(DirectNegativeCostFunction);

    virtual string info() const
        { return "direct_negative_cost_function"; }

    virtual real evaluate(const Vec& output, const Vec& target) const;
};

inline CostFunc directnegative_costfunc()
{ return new DirectNegativeCostFunction(); }

} // end of namespace PLearn

#endif

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