UnaryVariable.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:
// 
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
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//  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.
// 
//  3. The name of the authors may not be used to endorse or promote
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// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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// This file is part of the PLearn library. For more information on the PLearn
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/* *******************************************************      
   * $Id: UnaryVariable.h,v 1.10 2004/07/21 16:30:54 chrish42 Exp $
   * This file is part of the PLearn library.
   ******************************************************* */

#ifndef UnaryVariable_INC
#define UnaryVariable_INC

#include "VarArray.h"
#include <plearn/math/TMat_maths.h>

namespace PLearn {
using namespace std;

class UnaryVariable: public Variable
{
public:
  typedef Variable inherited;

protected:
  UnaryVariable() {}
  static void declareOptions(OptionList & ol);

protected:
  Var input;

public:
  UnaryVariable(Variable* v, int thelength, int thewidth);

  PLEARN_DECLARE_ABSTRACT_OBJECT(UnaryVariable);
  
  
  virtual void makeDeepCopyFromShallowCopy(map<const void*, void*>& copies);
  virtual bool markPath();
  virtual void buildPath(VarArray& proppath);
  virtual VarArray sources();
  virtual VarArray random_sources();
  virtual VarArray ancestors();
  virtual void unmarkAncestors();
  virtual VarArray parents();
  void printInfo(bool print_gradient) 
    { 
      cout << getName() << "[" << (void*)this << "] " << *this
           << " (" << (void*)input << ") = " << value;
      if (print_gradient) 
        cout << " gradient=" << gradient;
      cout << endl; 
    }
  virtual void resizeRValue();
};


} // end of namespace PLearn

#endif 

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