NistDB.h

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// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 1998 Pascal Vincent
// Copyright (C) 1999,2000 Pascal Vincent, Yoshua Bengio and University of Montreal
//

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/* *******************************************************      
   * $Id: NistDB.h,v 1.3 2004/07/21 16:30:51 chrish42 Exp $
   * AUTHORS: Pascal Vincent
   * This file is part of the PLearn library.
   ******************************************************* */


#ifndef NistDB_INC
#define NistDB_INC

#include <plearn/vmat/VMat.h>

namespace PLearn {
using namespace std;


class NistDB: public VMatrix
{
protected:
  mutable ifstream imagef;
  mutable ifstream labelf;
  mutable unsigned char buf[28*28];

public:

  NistDB(bool train);  
  
  virtual real get(int i, int j) const;
  virtual void getSubRow(int i, int j, Vec v) const;
};

inline void loadMNIST(VMat& training_set, VMat& test_set)
{
  training_set = new NistDB(true);
  test_set = new NistDB(false);
}

} // end of namespace PLearn


#endif

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