source: trunk/yat/classifier/DataLookup1D.cc @ 766

Last change on this file since 766 was 766, checked in by Peter, 15 years ago

added constructing view from utility::vector

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date ID
File size: 2.9 KB
Line 
1// $Id$
2
3/*
4  Copyright (C) The authors contributing to this file.
5
6  This file is part of the yat library, http://lev.thep.lu.se/trac/yat
7
8  The yat library is free software; you can redistribute it and/or
9  modify it under the terms of the GNU General Public License as
10  published by the Free Software Foundation; either version 2 of the
11  License, or (at your option) any later version.
12
13  The yat library is distributed in the hope that it will be useful,
14  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  General Public License for more details.
17
18  You should have received a copy of the GNU General Public License
19  along with this program; if not, write to the Free Software
20  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
21  02111-1307, USA.
22*/
23
24#include "DataLookup1D.h"
25#include "DataLookup2D.h"
26#include "MatrixLookup.h"
27
28#include "yat/utility/matrix.h"
29#include "yat/utility/vector.h"
30
31#include <cassert>
32#include <iostream>
33#include <iomanip>
34
35namespace theplu {
36namespace yat {
37namespace classifier {
38
39  DataLookup1D::DataLookup1D(const DataLookup2D& m, const size_t i, 
40                             const bool row_vector)
41    : column_vector_(!row_vector), index_(i), matrix_(&m), owner_(false)
42  {
43    assert( !column_vector_ || i<m.columns());
44    assert( column_vector_ || i<m.rows());
45  }
46 
47
48  DataLookup1D::DataLookup1D(const size_t size, const double value)
49    : column_vector_(false), index_(0), owner_(true)
50  {
51    matrix_ = new MatrixLookup(1,size,value);
52  }
53
54
55  DataLookup1D::DataLookup1D(const DataLookup1D& other)
56    : column_vector_(other.column_vector_), index_(other.index_),
57      matrix_(other.matrix_), owner_(false)
58  {
59  }
60
61
62  DataLookup1D::DataLookup1D(const utility::vector& v, 
63                             const std::vector<size_t>& index)
64    : column_vector_(true), index_(0), owner_(true)
65  {
66    utility::matrix* m = new utility::matrix(1,index.size());
67    for (size_t i=0; i<index.size(); ++i){
68      assert(index[i]<v.size());
69      (*m)(0,i)=v(index[i]);
70    }
71    matrix_ = new MatrixLookup(*m, true);
72  }
73
74
75  DataLookup1D::~DataLookup1D()
76  {
77    if (owner_)
78      delete matrix_;
79  }
80
81
82  size_t DataLookup1D::size(void) const
83  {
84    return column_vector_ ? matrix_->rows() : matrix_->columns();
85  }
86
87
88  double DataLookup1D::operator()(const size_t i) const
89  { 
90    assert(i<size());
91    return column_vector_ ? (*matrix_)(i,index_) : (*matrix_)(index_,i);
92  }
93
94
95  double DataLookup1D::operator[](const size_t i) const
96  { 
97    return this->operator()(i);
98  }
99
100
101  double DataLookup1D::operator*(const DataLookup1D& other) const
102  {
103    assert(other.size()==size());
104    double res=0;
105    for (size_t i = 0; i<size(); i++)
106      res += (*this)(i)*other(i);
107    return res;
108  }
109
110
111  std::ostream& operator<<(std::ostream& os, const DataLookup1D& x)
112  {
113    os.setf(std::ios::dec);
114    os.precision(12);
115   
116    for (size_t i=0; i<x.size(); ++i) {
117      os << x(i);
118      if ((i+1)<x.size())
119        os << os.fill();
120    }
121    return os;
122  }
123
124}}} // of namespace classifier, yat, and theplu
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