SoftSlopeIntegralVariable.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

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// modification, are permitted provided that the following conditions are met:
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//  1. Redistributions of source code must retain the above copyright
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/* *******************************************************      
   * $Id: SoftSlopeIntegralVariable.h,v 1.5 2004/07/21 16:30:54 chrish42 Exp $
   * This file is part of the PLearn library.
   ******************************************************* */

#ifndef SoftSlopeIntegralVariable_INC
#define SoftSlopeIntegralVariable_INC

#include "NaryVariable.h"
#include <plearn/math/pl_math.h>
#include "Var_utils.h"

namespace PLearn {
using namespace std;


// Integral wrt x, from a to b, of SoftSlopeVariable(x,smoothness,left,right)
class SoftSlopeIntegralVariable: public NaryVariable
{
  typedef NaryVariable inherited;

public:
//protected:
  real a,b;
  bool tabulated;

public:
  SoftSlopeIntegralVariable() {}
  SoftSlopeIntegralVariable(Variable* smoothness, Variable* left, Variable* right, real a_=0, real b_=1, bool tabulated=true);

  PLEARN_DECLARE_OBJECT(SoftSlopeIntegralVariable);
  static void declareOptions(OptionList &ol);

  virtual void recomputeSize(int& l, int& w) const;
  virtual void fprop();
  virtual void bprop();
  virtual void symbolicBprop();
};

DECLARE_OBJECT_PTR(SoftSlopeIntegralVariable);

inline Var soft_slope_integral(Var smoothness, Var left, Var right, real a=0, real b=1)
{
  return new SoftSlopeIntegralVariable(smoothness,left,right,a,b);
}

} // end of namespace PLearn

#endif 

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