RemoveRowsVMatrix.cc

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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.
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// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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// This file is part of the PLearn library. For more information on the PLearn
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/* *******************************************************      
   * $Id: RemoveRowsVMatrix.cc,v 1.3 2004/04/05 23:02:40 morinf Exp $
   ******************************************************* */

#include "RemoveRowsVMatrix.h"

namespace PLearn {
using namespace std;

PLEARN_IMPLEMENT_OBJECT(RemoveRowsVMatrix, "ONE LINE DESC", "NO HELP");

RemoveRowsVMatrix::RemoveRowsVMatrix(VMat the_distr, Vec the_indices)
  : inherited(the_distr->length()-the_indices.length(), the_distr->width()),
    distr(the_distr), indices(the_indices.copy())
{
    build();
}

void
RemoveRowsVMatrix::build()
{
    inherited::build();
    build_();
}

void
RemoveRowsVMatrix::build_()
{
    if (distr)
        fieldinfos = distr->fieldinfos;
    if (indices)
        sortElements(indices);
}

void
RemoveRowsVMatrix::declareOptions(OptionList &ol)
{
    declareOption(ol, "distr", &RemoveRowsVMatrix::distr, OptionBase::buildoption, "");
    declareOption(ol, "indices", &RemoveRowsVMatrix::indices, OptionBase::buildoption, "");
    inherited::declareOptions(ol);
}

int RemoveRowsVMatrix::getrownum(int i) const
{
  int k=0;
  while(k<indices.length() && indices[k]<=i)
  {
    i++;
    k++;
  }
  return i;
}

real RemoveRowsVMatrix::get(int i, int j) const
{ return distr->get(getrownum(i), j); }

void RemoveRowsVMatrix::getSubRow(int i, int j, Vec v) const
{ distr->getSubRow(getrownum(i), j, v); }

real RemoveRowsVMatrix::dot(int i1, int i2, int inputsize) const
{ return distr->dot(getrownum(i1),getrownum(i2),inputsize); }

real RemoveRowsVMatrix::dot(int i, const Vec& v) const
{ return distr->dot(getrownum(i),v); }


} // end of namespcae PLearn

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