source: trunk/yat/regression/KernelTriCube.cc

Last change on this file was 2919, checked in by Peter, 9 years ago

update copyright years

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 1.2 KB
Line 
1// $Id: KernelTriCube.cc 2919 2012-12-19 06:54:23Z peter $
2
3/*
4  Copyright (C) 2005 Peter Johansson
5  Copyright (C) 2006 Jari Häkkinen
6  Copyright (C) 2007, 2008 Jari Häkkinen, Peter Johansson
7  Copyright (C) 2012 Peter Johansson
8
9  This file is part of the yat library, http://dev.thep.lu.se/yat
10
11  The yat library is free software; you can redistribute it and/or
12  modify it under the terms of the GNU General Public License as
13  published by the Free Software Foundation; either version 3 of the
14  License, or (at your option) any later version.
15
16  The yat library is distributed in the hope that it will be useful,
17  but WITHOUT ANY WARRANTY; without even the implied warranty of
18  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  General Public License for more details.
20
21  You should have received a copy of the GNU General Public License
22  along with yat. If not, see <http://www.gnu.org/licenses/>.
23*/
24
25#include <config.h>
26
27#include "KernelTriCube.h"
28#include "Kernel.h"
29
30#include <cmath>
31
32namespace theplu {
33namespace yat {
34namespace regression {
35
36  KernelTriCube::KernelTriCube(void)
37    : Kernel()
38  {
39  }
40
41  double KernelTriCube::operator()(const double x) const
42  {
43    if (x>1 || x<-1)
44      return 0.0;
45    else
46      return pow(1-pow(std::abs(x),3),3);
47  }
48
49}}} // of namespaces regression, yat, and theplu
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