source: trunk/yat/regression/KernelTriCube.cc @ 1627

Last change on this file since 1627 was 1487, checked in by Jari Häkkinen, 13 years ago

Addresses #436. GPL license copy reference should also be updated.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 1.2 KB
Line 
1// $Id: KernelTriCube.cc 1487 2008-09-10 08:41:36Z jari $
2
3/*
4  Copyright (C) 2005 Peter Johansson
5  Copyright (C) 2006 Jari Häkkinen
6  Copyright (C) 2007 Jari Häkkinen, Peter Johansson
7
8  This file is part of the yat library, http://dev.thep.lu.se/yat
9
10  The yat library is free software; you can redistribute it and/or
11  modify it under the terms of the GNU General Public License as
12  published by the Free Software Foundation; either version 3 of the
13  License, or (at your option) any later version.
14
15  The yat library is distributed in the hope that it will be useful,
16  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  General Public License for more details.
19
20  You should have received a copy of the GNU General Public License
21  along with yat. If not, see <http://www.gnu.org/licenses/>.
22*/
23
24#include "KernelTriCube.h"
25#include "Kernel.h"
26
27#include <cmath>
28
29namespace theplu {
30namespace yat {
31namespace regression {
32
33  KernelTriCube::KernelTriCube(void)
34    : Kernel()
35  {
36  }
37
38  double KernelTriCube::operator()(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 namespaces regression, yat, and theplu
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