SHOGUN
3.2.1
首页
相关页面
模块
类
文件
文件列表
文件成员
全部
类
命名空间
文件
函数
变量
类型定义
枚举
枚举值
友元
宏定义
组
页
src
shogun
kernel
BesselKernel.cpp
浏览该文件的文档.
1
/*
2
* This program is free software; you can redistribute it and/or modify
3
* it under the terms of the GNU General Public License as published by
4
* the Free Software Foundation; either version 3 of the License, or
5
* (at your option) any later version.
6
*
7
* Written (W) 2011 Zi Yuan
8
* Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society
9
*/
10
11
#include <
shogun/kernel/BesselKernel.h
>
12
#include <
shogun/mathematics/Math.h
>
13
#include <math.h>
14
15
using namespace
shogun;
16
17
CBesselKernel::CBesselKernel
():
CDistanceKernel
(),order(0.0),degree(0)
18
{
19
init
();
20
}
21
22
CBesselKernel::CBesselKernel
(int32_t size,
float64_t
v,
float64_t
w,
23
int32_t n,
CDistance
* dist) :
24
CDistanceKernel
(size,w,dist), order(v), degree(n)
25
{
26
ASSERT
(
distance
)
27
SG_REF
(
distance
);
28
init
();
29
}
30
31
CBesselKernel::CBesselKernel
(
CFeatures
* l,
CFeatures
* r,
float64_t
v,
32
float64_t
w, int32_t n,
CDistance
* dist, int32_t size) :
33
CDistanceKernel
(size,w,dist), order(v), degree(n)
34
{
35
init
();
36
ASSERT
(
distance
)
37
SG_REF
(
distance
);
38
init
(l,r);
39
}
40
41
CBesselKernel::~CBesselKernel
()
42
{
43
cleanup
();
44
SG_UNREF
(
distance
);
45
}
46
47
void
CBesselKernel::cleanup
()
48
{
49
}
50
51
bool
CBesselKernel::init(
CFeatures
* l,
CFeatures
* r)
52
{
53
ASSERT
(
distance
)
54
CDistanceKernel::init(l,r);
55
distance
->
init
(l,r);
56
return
init_normalizer
();
57
}
58
59
void
CBesselKernel::init()
60
{
61
SG_ADD
(&
order
,
"order"
,
"Kernel order."
,
MS_AVAILABLE
);
62
SG_ADD
(&
degree
,
"degree"
,
"Kernel degree."
,
MS_AVAILABLE
);
63
}
64
65
float64_t
CBesselKernel::compute
(int32_t idx_a, int32_t idx_b)
66
{
67
float64_t
dist =
distance
->
distance
(idx_a, idx_b);
68
return
jn(
order
,dist/
width
)/
CMath::pow
(dist,-
degree
*
order
);
69
}
SHOGUN
机器学习工具包 - 项目文档