MovingAverageVMatrix.h

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// -*- C++ -*-

// MovingAverageVMatrix.h
//
// Copyright (C) 2004 Yoshua Bengio 
// 
// 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
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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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: MovingAverageVMatrix.h,v 1.3 2004/06/29 19:52:56 tihocan Exp $
   ******************************************************* */

// Authors: Yoshua Bengio

#ifndef MovingAverageVMatrix_INC
#define MovingAverageVMatrix_INC

#include "SourceVMatrix.h"

namespace PLearn {
using namespace std;

class MovingAverageVMatrix: public SourceVMatrix
{
  typedef SourceVMatrix inherited;

protected:
  // *********************
  // * protected options *
  // *********************

  Mat sums; // at (i,j), sum from the beginning of the source vmatrix at column j, up to row i
  Mat ma;  // moving average of width window_sizes[j] = (sums(i,j)-sums(i-window_sizes[j]))/window_sizes[j]
  TMat<int> nnonmissing; // at (i,j): nb of non-missing encountered in the source vmatrix at column j, up to row i
  Vec row;
  Vec previous_sourcerow;
  TVec<int> columns;
  int max_window_size;

public:

  // ************************
  // * public build options *
  // ************************

  // ### declare public option fields (such as build options) here
  TVec<string> columns_to_average;
  TVec<int> window_sizes;
  bool centered_windows;

  // ****************
  // * Constructors *
  // ****************

  // Default constructor, make sure the implementation in the .cc
  // initializes all fields to reasonable default values.
  MovingAverageVMatrix();

  // ******************
  // * Object methods *
  // ******************

private: 
  // (Please implement in .cc)
  void build_();

protected: 
  // (Please implement in .cc)
  static void declareOptions(OptionList& ol);

public:
  virtual void getNewRow(int i, Vec& v) const;

  // simply calls inherited::build() then build_() 
  virtual void build();

  virtual void makeDeepCopyFromShallowCopy(map<const void*, void*>& copies);

  PLEARN_DECLARE_OBJECT(MovingAverageVMatrix);

};
DECLARE_OBJECT_PTR(MovingAverageVMatrix);

} // end of namespace PLearn
#endif

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