source: trunk/yat/regression/Naive.cc @ 682

Last change on this file since 682 was 682, checked in by Jari Häkkinen, 16 years ago

Addresses #153. Moved regression files to .../yat/regression.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 1.5 KB
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1// $Id: Naive.cc 682 2006-10-11 22:06:38Z jari $
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 "Naive.h"
25#include "OneDimensional.h"
26#include "yat/statistics/Averager.h"
27#include "yat/statistics/AveragerWeighted.h"
28#include "yat/utility/vector.h"
29
30#include <cmath>
31#include <iostream>
32
33namespace theplu {
34namespace yat {
35namespace regression {
36
37  void Naive::fit(const utility::vector& x, const utility::vector& y)
38  {
39    ap_.reset();
40    for (size_t i=0; i<y.size(); i++)
41      ap_.add(x(i),y(i));
42  }
43
44  double Naive::predict(const double x) const
45  { 
46    return ap_.y_averager().mean(); 
47  }
48 
49  double Naive::prediction_error(const double x) const
50  {
51    return sqrt(msd_*(1.0+1.0/ap_.n()));
52  }
53
54  double Naive::standard_error(const double x) const
55  {
56    return sqrt(msd_/ap_.n());
57  }
58
59}}} // of namespaces regression, yat, and theplu
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