ConcatOfVariable.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: ConcatOfVariable.h,v 1.5 2004/04/27 16:03:35 morinf Exp $
   * This file is part of the PLearn library.
   ******************************************************* */

#ifndef ConcatOfVariable_INC
#define ConcatOfVariable_INC

#include "NaryVariable.h"

namespace PLearn {
using namespace std;



class ConcatOfVariable: public NaryVariable
{
  typedef NaryVariable inherited;

protected:
  VMat distr;
  Func f;

  Vec input_value;  
  Vec input_gradient; 

public:
  ConcatOfVariable() {}
  ConcatOfVariable(VMat the_distr, Func the_f);

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

  virtual void build();

  virtual void recomputeSize(int& l, int& w) const;
  virtual void makeDeepCopyFromShallowCopy(map<const void*, void*>& copies);

  virtual void fprop();
  virtual void bprop();
  virtual void fbprop();

private:
  void build_();
};

DECLARE_OBJECT_PTR(ConcatOfVariable);

inline Var concatOf(VMat distr, Func f)
{ return new ConcatOfVariable(distr,f); }

inline Var concatOf(Var output, const VarArray& inputs, VMat distr, int nsamples, VarArray parameters=VarArray())
{ return concatOf(distr,Func(inputs,output)); }


} // end of namespace PLearn

#endif 

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