# source:branches/0.4-stable/yat/regression/KernelTriCube.cc@1743

Last change on this file since 1743 was 1743, checked in by Peter, 12 years ago

• Property svn:eol-style set to `native`
• Property svn:keywords set to `Id`
File size: 1.3 KB
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1// \$Id: KernelTriCube.cc 1743 2009-01-23 14:20:30Z peter \$
2
3/*
4  Copyright (C) 2005 Peter Johansson
5  Copyright (C) 2006 Jari Häkkinen
6  Copyright (C) 2007 Jari Häkkinen, Peter Johansson
7  Copyright (C) 2008 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 2 of the
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 this program; if not, write to the Free Software
23  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
24  02111-1307, USA.
25*/
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(fabs(x),3),3);
47  }
48
49}}} // of namespaces regression, yat, and theplu
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