SHOGUN
v3.0.0
Main Page
Related Pages
Modules
Classes
Files
File List
File Members
All
Classes
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Friends
Macros
Groups
Pages
src
shogun
features
HashedDenseFeatures.h
Go to the documentation of this file.
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) 2013 Evangelos Anagnostopoulos
8
* Copyright (C) 2013 Evangelos Anagnostopoulos
9
*/
10
11
#ifndef _HASHED_DENSEFEATURES_H__
12
#define _HASHED_DENSEFEATURES_H__
13
14
#include <
shogun/features/DenseFeatures.h
>
15
#include <
shogun/features/DotFeatures.h
>
16
17
namespace
shogun
18
{
19
template
<
class
ST>
class
CDenseFeatures;
20
class
CDotFeatures;
21
25
template
<
class
ST>
class
CHashedDenseFeatures
:
public
CDotFeatures
26
{
27
public
:
28
35
CHashedDenseFeatures
(int32_t size=0,
bool
use_quadr =
false
,
bool
keep_lin_terms =
true
);
36
44
CHashedDenseFeatures
(
CDenseFeatures<ST>
* feats, int32_t d,
bool
use_quadr =
false
,
45
bool
keep_lin_terms =
true
);
46
54
CHashedDenseFeatures
(
SGMatrix<ST>
matrix, int32_t dm,
bool
use_quadr =
false
,
55
bool
keep_lin_terms =
true
);
56
66
CHashedDenseFeatures
(ST* src, int32_t num_feat, int32_t num_vec, int32_t d,
67
bool
use_quadr =
false
,
bool
keep_lin_terms =
true
);
68
76
CHashedDenseFeatures
(
CFile
* loader, int32_t d,
bool
use_quadr =
false
,
77
bool
keep_lin_terms =
false
);
78
80
CHashedDenseFeatures
(
const
CHashedDenseFeatures
& orig);
81
83
virtual
CFeatures
*
duplicate
()
const
;
84
86
virtual
~CHashedDenseFeatures
();
87
95
virtual
int32_t
get_dim_feature_space
()
const
;
96
106
virtual
float64_t
dot
(int32_t vec_idx1,
CDotFeatures
* df,
107
int32_t vec_idx2);
108
117
virtual
float64_t
dense_dot
(int32_t vec_idx1,
const
float64_t
* vec2,
118
int32_t vec2_len);
119
130
virtual
void
add_to_dense_vec
(
float64_t
alpha, int32_t vec_idx1,
131
float64_t
* vec2, int32_t vec2_len,
bool
abs_val =
false
);
132
138
virtual
int32_t
get_nnz_features_for_vector
(int32_t num);
139
151
virtual
void
*
get_feature_iterator
(int32_t vector_index);
152
165
virtual
bool
get_next_feature
(int32_t& index,
float64_t
& value,
166
void
* iterator);
167
173
virtual
void
free_feature_iterator
(
void
* iterator);
174
176
virtual
const
char
*
get_name
()
const
;
177
182
virtual
EFeatureType
get_feature_type
()
const
;
183
188
virtual
EFeatureClass
get_feature_class
()
const
;
189
194
virtual
int32_t
get_num_vectors
()
const
;
195
201
SGSparseVector<ST>
get_hashed_feature_vector
(int32_t vec_idx);
202
211
static
SGSparseVector<ST>
hash_vector
(
SGVector<ST>
vec, int32_t
dim
,
bool
use_quadratic
=
false
,
212
bool
keep_linear_terms
=
true
);
213
214
private
:
215
void
init(
CDenseFeatures<ST>
* feats, int32_t d,
bool
use_quadr,
bool
keep_lin_terms);
216
217
protected
:
218
220
CDenseFeatures<ST>
*
dense_feats
;
221
223
int32_t
dim
;
224
226
bool
use_quadratic
;
227
229
bool
keep_linear_terms
;
230
};
231
}
232
233
#endif // _HASHED_DENSEFEATURES_H__
SHOGUN
Machine Learning Toolbox - Documentation