RangeVMatrix.h

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// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 1998 Pascal Vincent
// Copyright (C) 1999-2001 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
// Copyright (C) 2002 Pascal Vincent, Julien Keable, Xavier Saint-Mleux
//
// 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.
// 
//  3. The name of the authors may not be used to endorse or promote
//     products derived from this software without specific prior written
//     permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
// NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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// 
// This file is part of the PLearn library. For more information on the PLearn
// library, go to the PLearn Web site at www.plearn.org


/* *******************************************************      
   * $Id: RangeVMatrix.h,v 1.4 2004/04/05 23:01:00 morinf Exp $
   ******************************************************* */


#ifndef RangeVMatrix_INC
#define RangeVMatrix_INC

#include "VMat.h"

namespace PLearn {
using namespace std;
 

class RangeVMatrix: public VMatrix
{
  typedef VMatrix inherited;

 protected:
  real start;
  real end;
  real step;

 public:
  // ******************
  // *  Constructors  *
  // ******************
  RangeVMatrix(); 

  RangeVMatrix(real the_start, real the_end, real the_step=1.0);

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

  virtual void build();

  virtual real get(int i, int j) const;
private:
    void build_();
};

inline VMat vrange(real start, real end, real step=1.0)
{ return new RangeVMatrix(start,end,step); }

DECLARE_OBJECT_PTR(RangeVMatrix);

} // end of namespcae PLearn
#endif

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