source: trunk/yat/classifier/DataLookup1D.cc @ 880

// $Id$

/*
  Copyright (C) 2005 Peter Johansson
  Copyright (C) 2006 Jari Häkkinen, Markus Ringnér, Peter Johansson
  Copyright (C) 2007 Peter Johansson

  This file is part of the yat library, http://trac.thep.lu.se/trac/yat

  The yat library is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 2 of the
  License, or (at your option) any later version.

  The yat library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/

#include "DataLookup1D.h"
#include "DataLookup2D.h"
#include "MatrixLookup.h"

#include "yat/utility/matrix.h"
#include "yat/utility/vector.h"

#include <cassert>
#include <iostream>
#include <iomanip>

namespace theplu {
namespace yat {
namespace classifier {

  DataLookup1D::DataLookup1D(const DataLookup2D& m, const size_t i, 
                             const bool row_vector)
    : column_vector_(!row_vector), index_(i), matrix_(&m), owner_(false)
  {
    assert( !column_vector_ || i<m.columns());
    assert( column_vector_ || i<m.rows());
  }
  

  DataLookup1D::DataLookup1D(const size_t size, const double value)
    : column_vector_(false), index_(0), owner_(true)
  {
    matrix_ = new MatrixLookup(1,size,value);
  }


  DataLookup1D::DataLookup1D(const DataLookup1D& other)
    : column_vector_(other.column_vector_), index_(other.index_),
      matrix_(other.matrix_), owner_(false)
  {
  }


  DataLookup1D::DataLookup1D(const utility::vector& v, 
                             const std::vector<size_t>& index)
    : column_vector_(true), index_(0), owner_(true)
  {
    utility::matrix* m = new utility::matrix(1,index.size());
    for (size_t i=0; i<index.size(); ++i){
      assert(index[i]<v.size());
      (*m)(0,i)=v(index[i]);
    }
    matrix_ = new MatrixLookup(*m, true);
  }


  DataLookup1D::DataLookup1D(const utility::vector& v)
    : column_vector_(false), index_(0), owner_(true)
  {
    utility::matrix* m = new utility::matrix(1,v.size());
    for (size_t i=0; i<v.size(); ++i){
      (*m)(0,i)=v(i);
    }
    matrix_ = new MatrixLookup(*m, true);
  }


  DataLookup1D::~DataLookup1D()
  {
    if (owner_)
      delete matrix_;
  }


  DataLookup1D::const_iterator DataLookup1D::begin(void) const
  {
    return DataLookup1D::const_iterator(*this, 0);
  }


  DataLookup1D::const_iterator DataLookup1D::end(void) const
  {
    return DataLookup1D::const_iterator(*this, size());
  }


  size_t DataLookup1D::size(void) const
  {
    return column_vector_ ? matrix_->rows() : matrix_->columns();
  }


  double DataLookup1D::operator()(const size_t i) const
  { 
    assert(i<size());
    return column_vector_ ? (*matrix_)(i,index_) : (*matrix_)(index_,i);
  }


  double DataLookup1D::operator[](const size_t i) const
  { 
    return this->operator()(i);
  }


  double DataLookup1D::operator*(const DataLookup1D& other) const
  {
    assert(other.size()==size());
    double res=0;
    for (size_t i = 0; i<size(); i++)
      res += (*this)(i)*other(i);
    return res;
  }


  std::ostream& operator<<(std::ostream& os, const DataLookup1D& x)
  {
    os.setf(std::ios::dec);
    os.precision(12);
    
    for (size_t i=0; i<x.size(); ++i) {
      os << x(i);
      if ((i+1)<x.size())
        os << os.fill();
    }
    return os;
  }

}}} // of namespace classifier, yat, and theplu