SelectRowsVMatrix.h

Go to the documentation of this file.

// -*- 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
// Copyright (C) 2003 Olivier Delalleau
//
// 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
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
// 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: SelectRowsVMatrix.h,v 1.11 2004/07/07 17:30:48 tihocan Exp $
   ******************************************************* */


#ifndef SelectRowsVMatrix_INC
#define SelectRowsVMatrix_INC

#include "SourceVMatrix.h"

namespace PLearn {
using namespace std;
 
class SelectRowsVMatrix: public SourceVMatrix
{

private:

  typedef SourceVMatrix inherited;

public:

  TVec<int> indices;

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

  SelectRowsVMatrix(VMat the_source, TVec<int> the_indices);
  
  SelectRowsVMatrix(VMat the_source, Vec the_indices);
  
  PLEARN_DECLARE_OBJECT(SelectRowsVMatrix);

  static void declareOptions(OptionList &ol);

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

protected:

  void getNewRow(int i, const Vec& v) const { getSubRow(i, 0, v); }

public:

  virtual real get(int i, int j) const;
  virtual void getSubRow(int i, int j, Vec v) const;
  virtual real getStringVal(int col, const string & str) const;
  virtual string getValString(int col, real val) const;
  virtual string getString(int row,int col) const;
  virtual const map<string,real>& getStringToRealMapping(int col) const;
  virtual const map<real,string>& getRealToStringMapping(int col) const;

  virtual void reset_dimensions() { source->reset_dimensions(); width_=source->width(); }
  virtual real dot(int i1, int i2, int inputsize) const;
  virtual real dot(int i, const Vec& v) const;

private:

  void build_();

};

DECLARE_OBJECT_PTR(SelectRowsVMatrix);

} // end of namespcae PLearn
#endif

---