SHOGUN  3.2.1
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CFeatureSelection< ST > 模板类 参考abstract

详细描述

template<class ST>
class shogun::CFeatureSelection< ST >

Template class CFeatureSelection, base class for all feature selection preprocessors which select a subset of features (dimensions in the feature matrix) to achieve a specified number of dimensions, m_target_dim from a given set of features. This class showcases all feature selection algorithms via a generic interface. Supported algorithms are specified by the enum EFeatureSelectionAlgorithm which can be set via set_algorithm() call. Supported wrapper algorithms are.

Since all these algorithm cannot be applied for all the feature selection approaches, the method set_algorithm() is kept abstract which is defined in the subclasses as appropriate.

The apply() method acts as a wrapper which decides which above methods to call based on the algorithm specified by m_algorithm. This method makes a deep copy of the original feature object using CSGObject::clone and then performs feature selection on it. The actual memory requirement depends on how copying a dimension subset is handled in CFeatures::copy_dimension_subset implementation.

For computing the measures that are used to rank the features for feature selection task, it relies on an abstract method compute_measures() which is defined in the subclasses.

Due to the difference in the measure, the removal policy for features can be different which is specified by the EFeatureRemovalPolicy enum and can be set by set_policy() call. The supported policies are

Note that not all policies can be adapted for a specific feature seleciton approaches. In general, in classes where feature selection is performed by removing the features which correspond to lowest measure, the policies N_SMALLEST and PERCENTILE_SMALLEST are appropriate. When features corresponding to highest measures are removed (e.g. training error in a cross-validation scenario), N_LARGEST and PERCENTILE_LARGEST are applicable. Therefore, set_policy() is kept abstract and subclasses define this to allow specific policies to be set.

Removal of features in each iteration is handled by an abstract method remove_feats() that removes a set of features at once based on the ranks of the features on the measure.

Some of the methods are for internal purpose and are not exposed to the public API. For example,

在文件 FeatureSelection.h134 行定义.

类 CFeatureSelection< ST > 继承关系图:
Inheritance graph
[图例]

Public 成员函数

 CFeatureSelection ()
 
virtual ~CFeatureSelection ()
 
virtual CFeaturesapply (CFeatures *features)
 
virtual float64_t compute_measures (CFeatures *features, index_t idx)=0
 
virtual CFeaturesremove_feats (CFeatures *features, SGVector< index_t > argsorted)=0
 
virtual EFeatureClass get_feature_class ()
 
virtual EFeatureType get_feature_type ()
 
virtual EPreprocessorType get_type () const
 
void set_target_dim (index_t target_dim)
 
index_t get_target_dim () const
 
virtual void set_algorithm (EFeatureSelectionAlgorithm algorithm)=0
 
EFeatureSelectionAlgorithm get_algorithm () const
 
virtual void set_policy (EFeatureRemovalPolicy policy)=0
 
EFeatureRemovalPolicy get_policy () const
 
void set_num_remove (index_t num_remove)
 
index_t get_num_remove () const
 
virtual void set_labels (CLabels *labels)
 
CLabelsget_labels () const
 
virtual void cleanup ()
 
virtual const char * get_name () const
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
template<>
EFeatureType get_feature_type ()
 
virtual bool init (CFeatures *features)=0
 
virtual CSGObjectshallow_copy () const
 
virtual CSGObjectdeep_copy () const
 
virtual bool is_generic (EPrimitiveType *generic) const
 
template<class T >
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
template<>
void set_generic ()
 
void unset_generic ()
 
virtual void print_serializable (const char *prefix="")
 
virtual bool save_serializable (CSerializableFile *file, const char *prefix="", int32_t param_version=Version::get_version_parameter())
 
virtual bool load_serializable (CSerializableFile *file, const char *prefix="", int32_t param_version=Version::get_version_parameter())
 
DynArray< TParameter * > * load_file_parameters (const SGParamInfo *param_info, int32_t file_version, CSerializableFile *file, const char *prefix="")
 
DynArray< TParameter * > * load_all_file_parameters (int32_t file_version, int32_t current_version, CSerializableFile *file, const char *prefix="")
 
void map_parameters (DynArray< TParameter * > *param_base, int32_t &base_version, DynArray< const SGParamInfo * > *target_param_infos)
 
void set_global_io (SGIO *io)
 
SGIOget_global_io ()
 
void set_global_parallel (Parallel *parallel)
 
Parallelget_global_parallel ()
 
void set_global_version (Version *version)
 
Versionget_global_version ()
 
SGStringList< char > get_modelsel_names ()
 
void print_modsel_params ()
 
char * get_modsel_param_descr (const char *param_name)
 
index_t get_modsel_param_index (const char *param_name)
 
void build_gradient_parameter_dictionary (CMap< TParameter *, CSGObject * > *dict)
 
virtual void update_parameter_hash ()
 
virtual bool parameter_hash_changed ()
 
virtual bool equals (CSGObject *other, float64_t accuracy=0.0, bool tolerant=false)
 
virtual CSGObjectclone ()
 

Public 属性

SGIOio
 
Parallelparallel
 
Versionversion
 
Parameterm_parameters
 
Parameterm_model_selection_parameters
 
Parameterm_gradient_parameters
 
ParameterMapm_parameter_map
 
uint32_t m_hash
 

Protected 成员函数

virtual CFeaturesapply_backward_elimination (CFeatures *features)
 
virtual void precompute ()
 
virtual void adapt_params (CFeatures *features)
 
index_t get_num_features (CFeatures *features) const
 
virtual TParametermigrate (DynArray< TParameter * > *param_base, const SGParamInfo *target)
 
virtual void one_to_one_migration_prepare (DynArray< TParameter * > *param_base, const SGParamInfo *target, TParameter *&replacement, TParameter *&to_migrate, char *old_name=NULL)
 
virtual void load_serializable_pre () throw (ShogunException)
 
virtual void load_serializable_post () throw (ShogunException)
 
virtual void save_serializable_pre () throw (ShogunException)
 
virtual void save_serializable_post () throw (ShogunException)
 

Protected 属性

index_t m_target_dim
 
EFeatureSelectionAlgorithm m_algorithm
 
EFeatureRemovalPolicy m_policy
 
index_t m_num_remove
 
CLabelsm_labels
 

构造及析构函数说明

Default constructor

在文件 FeatureSelection.cpp41 行定义.

~CFeatureSelection ( )
virtual

Destructor

在文件 FeatureSelection.cpp68 行定义.

成员函数说明

void adapt_params ( CFeatures features)
protectedvirtual

Tunes the parameters which are required to compute the measure based on current features. Overridden in the subclasses. Here it does nothing.

参数
featuresthe features based on which parameters are needed to be tuned for computing measures

在文件 FeatureSelection.cpp205 行定义.

CFeatures * apply ( CFeatures features)
virtual

Generic interface for applying the feature selection preprocessor. Acts as a wrapper which decides which actual method to call based on the algorithm specified.

参数
featuresthe input features
返回
the result feature object after applying the preprocessor

实现了 CPreprocessor.

在文件 FeatureSelection.cpp162 行定义.

CFeatures * apply_backward_elimination ( CFeatures features)
protectedvirtual

Applies backward elimination algorithm for performing feature selection. After performing necessary precomputing (defined by subclasses), it iteratively eliminates a number of features based on a measure until target dimension is reached.

参数
featuresthe input features
返回
the result feature object after applying the preprocessor

在文件 FeatureSelection.cpp80 行定义.

void build_gradient_parameter_dictionary ( CMap< TParameter *, CSGObject * > *  dict)
inherited

Builds a dictionary of all parameters in SGObject as well of those of SGObjects that are parameters of this object. Dictionary maps parameters to the objects that own them.

参数
dictdictionary of parameters to be built.

在文件 SGObject.cpp1185 行定义.

void cleanup ( )
virtual

performs cleanup

实现了 CPreprocessor.

在文件 FeatureSelection.cpp75 行定义.

CSGObject * clone ( )
virtualinherited

Creates a clone of the current object. This is done via recursively traversing all parameters, which corresponds to a deep copy. Calling equals on the cloned object always returns true although none of the memory of both objects overlaps.

返回
an identical copy of the given object, which is disjoint in memory. NULL if the clone fails. Note that the returned object is SG_REF'ed

在文件 SGObject.cpp1302 行定义.

virtual float64_t compute_measures ( CFeatures features,
index_t  idx 
)
pure virtual

Abstract method that is defined in the subclasses to compute the measures for the provided features based on which feature selection is performed.

参数
featuresthe features on which the measure has to be computed
idxthe index that decides which features should we compute the measure on
返回
the measure based on which features are selected

CDependenceMaximization 内被实现.

CSGObject * deep_copy ( ) const
virtualinherited

A deep copy. All the instance variables will also be copied.

在文件 SGObject.cpp146 行定义.

bool equals ( CSGObject other,
float64_t  accuracy = 0.0,
bool  tolerant = false 
)
virtualinherited

Recursively compares the current SGObject to another one. Compares all registered numerical parameters, recursion upon complex (SGObject) parameters. Does not compare pointers!

May be overwritten but please do with care! Should not be necessary in most cases.

参数
otherobject to compare with
accuracyaccuracy to use for comparison (optional)
tolerantallows linient check on float equality (within accuracy)
返回
true if all parameters were equal, false if not

在文件 SGObject.cpp1206 行定义.

EFeatureSelectionAlgorithm get_algorithm ( ) const
返回
the feature removal algorithm being used

在文件 FeatureSelection.cpp252 行定义.

EFeatureClass get_feature_class ( )
virtual
返回
the feature class, C_ANY

实现了 CPreprocessor.

在文件 FeatureSelection.cpp291 行定义.

virtual EFeatureType get_feature_type ( )
virtual
返回
feature type

实现了 CPreprocessor.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp303 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp309 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp315 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp321 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp327 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp333 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp339 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp345 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp351 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp357 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp363 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp369 行定义.

EFeatureType get_feature_type ( )
virtual
返回
type of objects preprocessor can deal with

实现了 CPreprocessor.

在文件 FeatureSelection.cpp375 行定义.

SGIO * get_global_io ( )
inherited

get the io object

返回
io object

在文件 SGObject.cpp183 行定义.

Parallel * get_global_parallel ( )
inherited

get the parallel object

返回
parallel object

在文件 SGObject.cpp224 行定义.

Version * get_global_version ( )
inherited

get the version object

返回
version object

在文件 SGObject.cpp237 行定义.

CLabels * get_labels ( ) const
返回
the labels

在文件 FeatureSelection.cpp284 行定义.

SGStringList< char > get_modelsel_names ( )
inherited
返回
vector of names of all parameters which are registered for model selection

在文件 SGObject.cpp1077 行定义.

char * get_modsel_param_descr ( const char *  param_name)
inherited

Returns description of a given parameter string, if it exists. SG_ERROR otherwise

参数
param_namename of the parameter
返回
description of the parameter

在文件 SGObject.cpp1101 行定义.

index_t get_modsel_param_index ( const char *  param_name)
inherited

Returns index of model selection parameter with provided index

参数
param_namename of model selection parameter
返回
index of model selection parameter with provided name, -1 if there is no such

在文件 SGObject.cpp1114 行定义.

virtual const char* get_name ( ) const
virtual
返回
the class name

实现了 CSGObject.

CDependenceMaximization, CBAHSIC , 以及 CKernelDependenceMaximization 重载.

在文件 FeatureSelection.h245 行定义.

index_t get_num_features ( CFeatures features) const
protected

Returns the number of features of the provided feature object. Since the number of features doesn't make sense for all types of features, this helper method checks whether obtaining a num_features is possible and then calls get_num_features() on those features after proper type-cast

参数
featuresthe feature object
返回
the number of features

在文件 FeatureSelection.cpp210 行定义.

index_t get_num_remove ( ) const
返回
number or percentage of features removed in each iteration

在文件 FeatureSelection.cpp270 行定义.

EFeatureRemovalPolicy get_policy ( ) const
返回
the feature removal policy being used

在文件 FeatureSelection.cpp258 行定义.

index_t get_target_dim ( ) const
返回
the target dimension

在文件 FeatureSelection.cpp246 行定义.

EPreprocessorType get_type ( ) const
virtual
返回
the preprocessor type

实现了 CPreprocessor.

CBAHSIC 重载.

在文件 FeatureSelection.cpp297 行定义.

virtual bool init ( CFeatures features)
pure virtualinherited
bool is_generic ( EPrimitiveType *  generic) const
virtualinherited

If the SGSerializable is a class template then TRUE will be returned and GENERIC is set to the type of the generic.

参数
genericset to the type of the generic if returning TRUE
返回
TRUE if a class template.

在文件 SGObject.cpp243 行定义.

DynArray< TParameter * > * load_all_file_parameters ( int32_t  file_version,
int32_t  current_version,
CSerializableFile file,
const char *  prefix = "" 
)
inherited

maps all parameters of this instance to the provided file version and loads all parameter data from the file into an array, which is sorted (basically calls load_file_parameter(...) for all parameters and puts all results into a sorted array)

参数
file_versionparameter version of the file
current_versionversion from which mapping begins (you want to use Version::get_version_parameter() for this in most cases)
filefile to load from
prefixprefix for members
返回
(sorted) array of created TParameter instances with file data

在文件 SGObject.cpp648 行定义.

DynArray< TParameter * > * load_file_parameters ( const SGParamInfo param_info,
int32_t  file_version,
CSerializableFile file,
const char *  prefix = "" 
)
inherited

loads some specified parameters from a file with a specified version The provided parameter info has a version which is recursively mapped until the file parameter version is reached. Note that there may be possibly multiple parameters in the mapping, therefore, a set of TParameter instances is returned

参数
param_infoinformation of parameter
file_versionparameter version of the file, must be <= provided parameter version
filefile to load from
prefixprefix for members
返回
new array with TParameter instances with the attached data

在文件 SGObject.cpp489 行定义.

bool load_serializable ( CSerializableFile file,
const char *  prefix = "",
int32_t  param_version = Version::get_version_parameter() 
)
virtualinherited

Load this object from file. If it will fail (returning FALSE) then this object will contain inconsistent data and should not be used!

参数
filewhere to load from
prefixprefix for members
param_version(optional) a parameter version different to (this is mainly for testing, better do not use)
返回
TRUE if done, otherwise FALSE

在文件 SGObject.cpp320 行定义.

void load_serializable_post ( )
throw (ShogunException
)
protectedvirtualinherited

Can (optionally) be overridden to post-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::LOAD_SERIALIZABLE_POST is called.

异常
ShogunExceptionWill be thrown if an error occurres.

CKernel, CWeightedDegreePositionStringKernel, CList, CAlphabet, CLinearHMM, CGaussianKernel, CInverseMultiQuadricKernel, CCircularKernel , 以及 CExponentialKernel 重载.

在文件 SGObject.cpp1004 行定义.

void load_serializable_pre ( )
throw (ShogunException
)
protectedvirtualinherited

Can (optionally) be overridden to pre-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::LOAD_SERIALIZABLE_PRE is called.

异常
ShogunExceptionWill be thrown if an error occurres.

CDynamicArray< T >, CDynamicArray< float64_t >, CDynamicArray< float32_t >, CDynamicArray< int32_t >, CDynamicArray< char >, CDynamicArray< bool > , 以及 CDynamicObjectArray 重载.

在文件 SGObject.cpp999 行定义.

void map_parameters ( DynArray< TParameter * > *  param_base,
int32_t &  base_version,
DynArray< const SGParamInfo * > *  target_param_infos 
)
inherited

Takes a set of TParameter instances (base) with a certain version and a set of target parameter infos and recursively maps the base level wise to the current version using CSGObject::migrate(...). The base is replaced. After this call, the base version containing parameters should be of same version/type as the initial target parameter infos. Note for this to work, the migrate methods and all the internal parameter mappings have to match

参数
param_baseset of TParameter instances that are mapped to the provided target parameter infos
base_versionversion of the parameter base
target_param_infosset of SGParamInfo instances that specify the target parameter base

在文件 SGObject.cpp686 行定义.

TParameter * migrate ( DynArray< TParameter * > *  param_base,
const SGParamInfo target 
)
protectedvirtualinherited

creates a new TParameter instance, which contains migrated data from the version that is provided. The provided parameter data base is used for migration, this base is a collection of all parameter data of the previous version. Migration is done FROM the data in param_base TO the provided param info Migration is always one version step. Method has to be implemented in subclasses, if no match is found, base method has to be called.

If there is an element in the param_base which equals the target, a copy of the element is returned. This represents the case when nothing has changed and therefore, the migrate method is not overloaded in a subclass

参数
param_baseset of TParameter instances to use for migration
targetparameter info for the resulting TParameter
返回
a new TParameter instance with migrated data from the base of the type which is specified by the target parameter

在文件 SGObject.cpp893 行定义.

void one_to_one_migration_prepare ( DynArray< TParameter * > *  param_base,
const SGParamInfo target,
TParameter *&  replacement,
TParameter *&  to_migrate,
char *  old_name = NULL 
)
protectedvirtualinherited

This method prepares everything for a one-to-one parameter migration. One to one here means that only ONE element of the parameter base is needed for the migration (the one with the same name as the target). Data is allocated for the target (in the type as provided in the target SGParamInfo), and a corresponding new TParameter instance is written to replacement. The to_migrate pointer points to the single needed TParameter instance needed for migration. If a name change happened, the old name may be specified by old_name. In addition, the m_delete_data flag of to_migrate is set to true. So if you want to migrate data, the only thing to do after this call is converting the data in the m_parameter fields. If unsure how to use - have a look into an example for this. (base_migration_type_conversion.cpp for example)

参数
param_baseset of TParameter instances to use for migration
targetparameter info for the resulting TParameter
replacement(used as output) here the TParameter instance which is returned by migration is created into
to_migratethe only source that is used for migration
old_namewith this parameter, a name change may be specified

在文件 SGObject.cpp833 行定义.

bool parameter_hash_changed ( )
virtualinherited
返回
whether parameter combination has changed since last update

在文件 SGObject.cpp209 行定义.

void precompute ( )
protectedvirtual

Performs the tasks which can be computed beforehand before the actual algorithm begins. This method is overridden in the subclasses. Here it does nothing.

CKernelDependenceMaximization 重载.

在文件 FeatureSelection.cpp200 行定义.

void print_modsel_params ( )
inherited

prints all parameter registered for model selection and their type

在文件 SGObject.cpp1053 行定义.

void print_serializable ( const char *  prefix = "")
virtualinherited

prints registered parameters out

参数
prefixprefix for members

在文件 SGObject.cpp255 行定义.

virtual CFeatures* remove_feats ( CFeatures features,
SGVector< index_t argsorted 
)
pure virtual

Abstract method which is defined in the subclasses to handle the removal of features based on removal policy (see class documentation).

参数
featuresthe features object from which specific features has to be removed
argsortedthe argsorted features based on their measures, entry at 0 being the index of the feature corresponding to the smallest measure.
返回
the feature object after removal of features based on the policy

CDependenceMaximization 内被实现.

bool save_serializable ( CSerializableFile file,
const char *  prefix = "",
int32_t  param_version = Version::get_version_parameter() 
)
virtualinherited

Save this object to file.

参数
filewhere to save the object; will be closed during returning if PREFIX is an empty string.
prefixprefix for members
param_version(optional) a parameter version different to (this is mainly for testing, better do not use)
返回
TRUE if done, otherwise FALSE

在文件 SGObject.cpp261 行定义.

void save_serializable_post ( )
throw (ShogunException
)
protectedvirtualinherited

Can (optionally) be overridden to post-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::SAVE_SERIALIZABLE_POST is called.

异常
ShogunExceptionWill be thrown if an error occurres.

CKernel 重载.

在文件 SGObject.cpp1014 行定义.

void save_serializable_pre ( )
throw (ShogunException
)
protectedvirtualinherited

Can (optionally) be overridden to pre-initialize some member variables which are not PARAMETER::ADD'ed. Make sure that at first the overridden method BASE_CLASS::SAVE_SERIALIZABLE_PRE is called.

异常
ShogunExceptionWill be thrown if an error occurres.

CKernel, CDynamicArray< T >, CDynamicArray< float64_t >, CDynamicArray< float32_t >, CDynamicArray< int32_t >, CDynamicArray< char >, CDynamicArray< bool > , 以及 CDynamicObjectArray 重载.

在文件 SGObject.cpp1009 行定义.

virtual void set_algorithm ( EFeatureSelectionAlgorithm  algorithm)
pure virtual

Abstract method which is overridden in the subclasses to set accepted feature selection algorithm

参数
algorithmthe feature selection algorithm to use

CDependenceMaximization, CKernelDependenceMaximization , 以及 CBAHSIC 内被实现.

void set_generic ( )
inherited

在文件 SGObject.cpp38 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp43 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp48 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp53 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp58 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp63 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp68 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp73 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp78 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp83 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp88 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp93 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp98 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp103 行定义.

void set_generic ( )
inherited

在文件 SGObject.cpp108 行定义.

void set_generic ( )
inherited

set generic type to T

void set_global_io ( SGIO io)
inherited

set the io object

参数
ioio object to use

在文件 SGObject.cpp176 行定义.

void set_global_parallel ( Parallel parallel)
inherited

set the parallel object

参数
parallelparallel object to use

在文件 SGObject.cpp189 行定义.

void set_global_version ( Version version)
inherited

set the version object

参数
versionversion object to use

在文件 SGObject.cpp230 行定义.

void set_labels ( CLabels labels)
virtual

Setter for labels. This method may be overridden in subclasses if necessary to set some additional parameters associated with it. For example, in CDependenceMaximization, we need a feature instance of the labels which is used in the estimator. So this method is overridden there to internally convert the labels to a dense feature object in this set call only

参数
labelsthe labels

CDependenceMaximization 重载.

在文件 FeatureSelection.cpp276 行定义.

void set_num_remove ( index_t  num_remove)

Use this method to set the number or percentile of features to be removed in each iteration.

参数
num_removenumber or percentage of features to be removed in each iteration

在文件 FeatureSelection.cpp264 行定义.

virtual void set_policy ( EFeatureRemovalPolicy  policy)
pure virtual

Abstract method which is overridden in the subclasses to set accepted feature removal policies based on the measure they use

参数
policythe feature removal policy

CDependenceMaximization 内被实现.

void set_target_dim ( index_t  target_dim)
参数
target_dimthe target dimension to achieve

在文件 FeatureSelection.cpp240 行定义.

CSGObject * shallow_copy ( ) const
virtualinherited

A shallow copy. All the SGObject instance variables will be simply assigned and SG_REF-ed.

CGaussianKernel 重载.

在文件 SGObject.cpp140 行定义.

void unset_generic ( )
inherited

unset generic type

this has to be called in classes specializing a template class

在文件 SGObject.cpp250 行定义.

void update_parameter_hash ( )
virtualinherited

Updates the hash of current parameter combination

在文件 SGObject.cpp196 行定义.

类成员变量说明

SGIO* io
inherited

io

在文件 SGObject.h461 行定义.

EFeatureSelectionAlgorithm m_algorithm
protected

Wrapper algorithm for feature selection

在文件 FeatureSelection.h293 行定义.

Parameter* m_gradient_parameters
inherited

parameters wrt which we can compute gradients

在文件 SGObject.h476 行定义.

uint32_t m_hash
inherited

Hash of parameter values

在文件 SGObject.h482 行定义.

CLabels* m_labels
protected

The labels for the feature vectors

在文件 FeatureSelection.h307 行定义.

Parameter* m_model_selection_parameters
inherited

model selection parameters

在文件 SGObject.h473 行定义.

index_t m_num_remove
protected

Number or percentage of features to be removed. When the policy is set as N_SMALLEST or N_LARGEST, this number decides how many features in an iteration. For PERCENTILE_SMALLEST or PERCENTILE_LARGEST, this decides the percentage of current number of features to be removed in each iteration

在文件 FeatureSelection.h304 行定义.

ParameterMap* m_parameter_map
inherited

map for different parameter versions

在文件 SGObject.h479 行定义.

Parameter* m_parameters
inherited

parameters

在文件 SGObject.h470 行定义.

EFeatureRemovalPolicy m_policy
protected

Feature removal policy

在文件 FeatureSelection.h296 行定义.

index_t m_target_dim
protected

Target dimension

在文件 FeatureSelection.h290 行定义.

Parallel* parallel
inherited

parallel

在文件 SGObject.h464 行定义.

Version* version
inherited

version

在文件 SGObject.h467 行定义.


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