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

#include "RangeVMatrix.h"

namespace PLearn {
using namespace std;

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

RangeVMatrix::RangeVMatrix()
  : start(0), end(0), step(1)
{
}

RangeVMatrix::RangeVMatrix(real the_start, real the_end, real the_step)
  : start(the_start), end(the_end), step(the_step)
{
  build();
}

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

void
RangeVMatrix::build_()
{
  width_=1;
  length_ = (int)((end-start)/step); 
  if (length_*step==(end-start))
    length_++;
}

void
RangeVMatrix::declareOptions(OptionList &ol)
{
  declareOption(ol, "start", &RangeVMatrix::start, OptionBase::buildoption, "");
  declareOption(ol, "end", &RangeVMatrix::end, OptionBase::buildoption, "");
  declareOption(ol, "step", &RangeVMatrix::step, OptionBase::buildoption, "");
  inherited::declareOptions(ol);
}

real RangeVMatrix::get(int i, int j) const
{
#ifdef BOUNDCHECK
  if(j!=0 || i<0 || i>=length())
    PLERROR("In RangeVMatrix::get OUT OF BOUNDS");
#endif
  return start+i*step;
}


} // end of namespcae PLearn

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