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
features
DotFeatures.h
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) 2009-2010 Soeren Sonnenburg
8
* Copyright (C) 2009 Fraunhofer Institute FIRST and Max-Planck-Society
9
* Copyright (C) 2010 Berlin Institute of Technology
10
*/
11
12
#ifndef _DOTFEATURES_H___
13
#define _DOTFEATURES_H___
14
15
#include <
shogun/lib/common.h
>
16
#include <
shogun/features/Features.h
>
17
18
namespace
shogun
19
{
41
class
CDotFeatures
:
public
CFeatures
42
{
43
public
:
44
49
CDotFeatures
(int32_t size=0);
50
52
CDotFeatures
(
const
CDotFeatures
& orig);
53
58
CDotFeatures
(
CFile
* loader);
59
60
virtual
~CDotFeatures
() { }
61
69
virtual
int32_t
get_dim_feature_space
()
const
=0;
70
78
virtual
float64_t
dot
(int32_t vec_idx1,
CDotFeatures
* df, int32_t vec_idx2)=0;
79
85
virtual
float64_t
dense_dot_sgvec
(int32_t vec_idx1,
const
SGVector<float64_t>
vec2);
86
93
virtual
float64_t
dense_dot
(int32_t vec_idx1,
const
float64_t
* vec2, int32_t vec2_len)=0;
94
103
virtual
void
add_to_dense_vec
(
float64_t
alpha, int32_t vec_idx1,
float64_t
* vec2, int32_t vec2_len,
bool
abs_val=
false
)=0;
104
118
virtual
void
dense_dot_range
(
float64_t
* output, int32_t start, int32_t stop,
float64_t
* alphas,
float64_t
* vec, int32_t dim,
float64_t
b);
119
131
virtual
void
dense_dot_range_subset
(int32_t* sub_index, int32_t num,
132
float64_t
* output,
float64_t
* alphas,
float64_t
* vec, int32_t dim,
float64_t
b);
133
136
static
void
*
dense_dot_range_helper
(
void
* p);
137
145
virtual
int32_t
get_nnz_features_for_vector
(int32_t num)=0;
146
151
inline
float64_t
get_combined_feature_weight
() {
return
combined_weight
; }
152
157
inline
void
set_combined_feature_weight
(
float64_t
nw) {
combined_weight
=nw; }
158
163
SGMatrix<float64_t>
get_computed_dot_feature_matrix
();
164
169
SGVector<float64_t>
get_computed_dot_feature_vector
(int32_t num);
170
172
void
benchmark_add_to_dense_vector
(int32_t repeats=5);
173
175
void
benchmark_dense_dot_range
(int32_t repeats=5);
176
186
virtual
void
*
get_feature_iterator
(int32_t vector_index)=0;
187
198
virtual
bool
get_next_feature
(int32_t& index,
float64_t
& value,
void
* iterator)=0;
199
205
virtual
void
free_feature_iterator
(
void
* iterator)=0;
206
211
virtual
SGVector<float64_t>
get_mean
();
212
217
static
SGVector<float64_t>
get_mean
(
CDotFeatures
* lhs,
CDotFeatures
* rhs);
218
223
virtual
SGMatrix<float64_t>
get_cov
();
224
229
static
SGMatrix<float64_t>
compute_cov
(
CDotFeatures
* lhs,
CDotFeatures
* rhs);
230
231
protected
:
238
void
display_progress
(int32_t start, int32_t stop, int32_t v);
239
240
private
:
241
void
init();
242
243
protected
:
244
246
float64_t
combined_weight
;
247
};
248
}
249
#endif // _DOTFEATURES_H___
SHOGUN
机器学习工具包 - 项目文档