source: trunk/c++_tools/statistics/KernelTriCube.cc @ 675

Last change on this file since 675 was 675, checked in by Jari Häkkinen, 15 years ago

References #83. Changing project name to yat. Compilation will fail in this revision.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 1.2 KB
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1// $Id: KernelTriCube.cc 675 2006-10-10 12:08:45Z 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 "yat/statistics/KernelTriCube.h"
25#include "yat/statistics/Kernel.h"
26
27#include <cmath>
28
29namespace theplu {
30namespace statistics {
31namespace regression {
32
33  KernelTriCube::KernelTriCube(void)
34    : Kernel()
35  {
36  }
37
38  double KernelTriCube::weight(const double x) const
39  {
40    if (x>1 || x<-1)
41      return 0.0;
42    else
43      return pow(1-pow(fabs(x),3),3);
44  }
45
46} // of namespace regression
47} // of namespace statistics
48} // of namespace theplu
49
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