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CMatrixFeatures< ST > Class Template Reference

Detailed Description

template<class ST>
class shogun::CMatrixFeatures< ST >

Class CMatrixFeatures used to represent data whose feature vectors are better represented with matrices rather than with unidimensional arrays or vectors. Optionally, it can be restricted that all the feature vectors have the same number of features. Set the attribute num_features different to zero to use this restriction. Allow feature vectors with different number of features by setting num_features equal to zero (default behaviour).

Definition at line 29 of file MatrixFeatures.h.

Inheritance diagram for CMatrixFeatures< ST >:
Inheritance graph
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Public Member Functions

 CMatrixFeatures ()
 CMatrixFeatures (int32_t num_vecs, int32_t num_feats=0)
 CMatrixFeatures (SGMatrixList< ST > feats, int32_t num_feats=0)
 CMatrixFeatures (SGMatrix< ST > feats, int32_t feat_length, int32_t num_vecs)
virtual CFeaturesduplicate () const
virtual ~CMatrixFeatures ()
virtual EFeatureType get_feature_type () const
virtual EFeatureClass get_feature_class () const
virtual int32_t get_num_vectors () const
virtual int32_t get_size () const
SGMatrix< ST > get_feature_vector (int32_t num) const
void get_feature_vector_col (SGVector< ST > out, int32_t num, int32_t col) const
void set_feature_vector (SGMatrix< ST > const &vec, int32_t num)
SGMatrixList< ST > get_features () const
void set_features (SGMatrixList< ST > features, int32_t num_feats)
virtual const char * get_name () const
int32_t get_num_features () const
virtual int32_t add_preprocessor (CPreprocessor *p)
 set preprocessor
virtual CPreprocessordel_preprocessor (int32_t num)
 del current preprocessor
CPreprocessorget_preprocessor (int32_t num) const
 get current preprocessor
void set_preprocessed (int32_t num)
bool is_preprocessed (int32_t num) const
int32_t get_num_preprocessed () const
 get whether specified preprocessor (or all if num=1) was/were already applied
int32_t get_num_preprocessors () const
void clean_preprocessors ()
int32_t get_cache_size () const
virtual bool reshape (int32_t num_features, int32_t num_vectors)
void list_feature_obj () const
virtual void load (CFile *loader)
virtual void save (CFile *writer)
bool check_feature_compatibility (CFeatures *f) const
bool has_property (EFeatureProperty p) const
void set_property (EFeatureProperty p)
void unset_property (EFeatureProperty p)
virtual CFeaturescreate_merged_copy (CFeatures *other)
virtual void add_subset (SGVector< index_t > subset)
virtual void remove_subset ()
virtual void remove_all_subsets ()
virtual CSubsetStackget_subset_stack ()
virtual void subset_changed_post ()
virtual CFeaturescopy_subset (SGVector< index_t > indices)
virtual CSGObjectshallow_copy () const
virtual CSGObjectdeep_copy () const
virtual bool is_generic (EPrimitiveType *generic) const
template<class T >
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_PARAMETER)
virtual bool load_serializable (CSerializableFile *file, const char *prefix="", int32_t param_version=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_parameter_dictionary (CMap< TParameter *, CSGObject * > &dict)

Public Attributes

SGIOio
Parallelparallel
Versionversion
Parameterm_parameters
Parameterm_model_selection_parameters
ParameterMapm_parameter_map
uint32_t m_hash

Protected Member Functions

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)
virtual bool update_parameter_hash ()

Protected Attributes

CSubsetStackm_subset_stack

Constructor & Destructor Documentation

default constructor

Definition at line 15 of file MatrixFeatures.cpp.

CMatrixFeatures ( int32_t  num_vecs,
int32_t  num_feats = 0 
)

standard constructor

Parameters
num_vecsnumber of vectors
num_featsnumber of features per vector

Definition at line 21 of file MatrixFeatures.cpp.

CMatrixFeatures ( SGMatrixList< ST >  feats,
int32_t  num_feats = 0 
)

constructor

Parameters
featslist of feature matrices
num_featsnumber of features per vector

Definition at line 32 of file MatrixFeatures.cpp.

CMatrixFeatures ( SGMatrix< ST >  feats,
int32_t  feat_length,
int32_t  num_vecs 
)

constructor using the data of all the features concatenated in a matrix. All the features are assumed to have the same length. The number of colums of feats must be equal to feat_length times num_vecs. The number of features per vector is equal to the number of rows of feats.

Parameters
featsconcatenation of the features
feat_lengthlength of each feature
num_vecsnumber of feature vectors

Definition at line 40 of file MatrixFeatures.cpp.

~CMatrixFeatures ( )
virtual

destructor

Definition at line 57 of file MatrixFeatures.cpp.

Member Function Documentation

int32_t add_preprocessor ( CPreprocessor p)
virtualinherited

set preprocessor

add preprocessor

Parameters
ppreprocessor to set
Returns
something inty

Definition at line 81 of file Features.cpp.

void add_subset ( SGVector< index_t subset)
virtualinherited

adds a subset of indices on top of the current subsets (possibly subset o subset. Calls subset_changed_post() afterwards

Parameters
subsetsubset of indices to add

Reimplemented in CCombinedFeatures.

Definition at line 351 of file Features.cpp.

void build_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.

Parameters
dictdictionary of parameters to be built.

Definition at line 1204 of file SGObject.cpp.

bool check_feature_compatibility ( CFeatures f) const
inherited

check feature compatibility

Parameters
ffeatures to check for compatibility
Returns
if features are compatible

Definition at line 326 of file Features.cpp.

void clean_preprocessors ( )
inherited

clears all preprocs

Definition at line 137 of file Features.cpp.

CFeatures * copy_subset ( SGVector< index_t indices)
virtualinherited

Creates a new CFeatures instance containing copies of the elements which are specified by the provided indices.

This method is needed for a KernelMachine to store its model data. NOT IMPLEMENTED!

Parameters
indicesindices of feature elements to copy
Returns
new CFeatures instance with copies of feature data

Reimplemented in CStringFeatures< ST >, CStringFeatures< T >, CStringFeatures< uint8_t >, CStringFeatures< char >, CStringFeatures< uint16_t >, CSparseFeatures< ST >, CSparseFeatures< float64_t >, CSparseFeatures< T >, CDenseFeatures< ST >, CDenseFeatures< uint32_t >, CDenseFeatures< float64_t >, CDenseFeatures< T >, CDenseFeatures< uint16_t >, and CCombinedFeatures.

Definition at line 374 of file Features.cpp.

virtual CFeatures* create_merged_copy ( CFeatures other)
virtualinherited

Takes another feature instance and returns a new instance which is a concatenation of a copy if this instace's data and the given instance's data. Note that the feature types have to be equal.

NOT IMPLEMENTED!

Parameters
otherfeature object to append
Returns
new feature object which contains copy of data of this instance and of given one

Reimplemented in CDenseFeatures< ST >, CDenseFeatures< uint32_t >, CDenseFeatures< float64_t >, CDenseFeatures< T >, CDenseFeatures< uint16_t >, and CCombinedFeatures.

Definition at line 234 of file Features.h.

virtual CSGObject* deep_copy ( ) const
virtualinherited

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

Definition at line 131 of file SGObject.h.

CPreprocessor * del_preprocessor ( int32_t  num)
virtualinherited

del current preprocessor

delete preprocessor from list caller has to clean up returned preproc

Parameters
numindex of preprocessor in list

Definition at line 143 of file Features.cpp.

CFeatures * duplicate ( ) const
virtual

duplicate feature object

Returns
feature object

Implements CFeatures.

Definition at line 52 of file MatrixFeatures.cpp.

int32_t get_cache_size ( ) const
inherited

get cache size

Returns
cache size

Definition at line 203 of file Features.cpp.

EFeatureClass get_feature_class ( ) const
virtual

get feature class

Returns
feature class like STRING, SIMPLE, SPARSE...

Implements CFeatures.

Definition at line 69 of file MatrixFeatures.cpp.

EFeatureType get_feature_type ( ) const
virtual

get feature type

Returns
templated feature type

Implements CFeatures.

Definition at line 63 of file MatrixFeatures.cpp.

SGMatrix< ST > get_feature_vector ( int32_t  num) const

get feature vector num

Parameters
numfeature vector index
Returns
feature vector

Definition at line 80 of file MatrixFeatures.cpp.

void get_feature_vector_col ( SGVector< ST >  out,
int32_t  num,
int32_t  col 
) const

get a column of a feature vector

Parameters
outwhere the column will be copied
numindex of the feature vector
colindex of the column to get

Definition at line 92 of file MatrixFeatures.cpp.

SGMatrixList< ST > get_features ( ) const

get features

Returns
features

Definition at line 124 of file MatrixFeatures.h.

SGIO * get_global_io ( )
inherited

get the io object

Returns
io object

Definition at line 224 of file SGObject.cpp.

Parallel * get_global_parallel ( )
inherited

get the parallel object

Returns
parallel object

Definition at line 259 of file SGObject.cpp.

Version * get_global_version ( )
inherited

get the version object

Returns
version object

Definition at line 272 of file SGObject.cpp.

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

Definition at line 1108 of file SGObject.cpp.

char * get_modsel_param_descr ( const char *  param_name)
inherited

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

Parameters
param_namename of the parameter
Returns
description of the parameter

Definition at line 1132 of file SGObject.cpp.

index_t get_modsel_param_index ( const char *  param_name)
inherited

Returns index of model selection parameter with provided index

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

Definition at line 1145 of file SGObject.cpp.

virtual const char* get_name ( ) const
virtual
Returns
object name

Implements CSGObject.

Definition at line 134 of file MatrixFeatures.h.

int32_t get_num_features ( ) const
Returns
the number of features

Definition at line 137 of file MatrixFeatures.h.

int32_t get_num_preprocessed ( ) const
inherited

get whether specified preprocessor (or all if num=1) was/were already applied

get the number of applied preprocs

Returns
number of applied preprocessors

Definition at line 123 of file Features.cpp.

int32_t get_num_preprocessors ( ) const
inherited

get number of preprocessors

Returns
number of preprocessors

Definition at line 198 of file Features.cpp.

virtual int32_t get_num_vectors ( ) const
virtual

get number of examples/vectors, possibly corresponding to the current subset

Returns
number of examples/vectors (possibly of subset, if implemented)

Implements CFeatures.

Definition at line 89 of file MatrixFeatures.h.

CPreprocessor * get_preprocessor ( int32_t  num) const
inherited

get current preprocessor

get specified preprocessor

Parameters
numindex of preprocessor in list

Definition at line 111 of file Features.cpp.

int32_t get_size ( ) const
virtual

get memory footprint of one feature

Returns
memory footprint of one feature

Implements CFeatures.

Definition at line 75 of file MatrixFeatures.cpp.

CSubsetStack * get_subset_stack ( )
virtualinherited

returns subset stack

Returns
subset stack

Definition at line 369 of file Features.cpp.

bool has_property ( EFeatureProperty  p) const
inherited

check if features have given property

Parameters
pfeature property
Returns
if features have given property

Definition at line 336 of file Features.cpp.

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.

Parameters
genericset to the type of the generic if returning TRUE
Returns
TRUE if a class template.

Definition at line 278 of file SGObject.cpp.

bool is_preprocessed ( int32_t  num) const
inherited

get whether specified preprocessor was already applied

Parameters
numindex of preprocessor in list

Definition at line 193 of file Features.cpp.

void list_feature_obj ( ) const
inherited

list feature object

Definition at line 214 of file Features.cpp.

void load ( CFile loader)
virtualinherited
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)

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

Definition at line 679 of file SGObject.cpp.

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

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

Definition at line 523 of file SGObject.cpp.

bool load_serializable ( CSerializableFile file,
const char *  prefix = "",
int32_t  param_version = 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!

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

Reimplemented in CModelSelectionParameters.

Definition at line 354 of file SGObject.cpp.

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.

Exceptions
ShogunExceptionWill be thrown if an error occurres.

Reimplemented in CKernel, CWeightedDegreePositionStringKernel, CList, CAlphabet, CLinearHMM, CGaussianKernel, CANOVAKernel, CInverseMultiQuadricKernel, CCircularKernel, and CExponentialKernel.

Definition at line 1033 of file SGObject.cpp.

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.

Exceptions
ShogunExceptionWill be thrown if an error occurres.

Definition at line 1028 of file SGObject.cpp.

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

Parameters
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

Definition at line 717 of file SGObject.cpp.

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

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

Definition at line 923 of file SGObject.cpp.

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)

Parameters
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

Definition at line 864 of file SGObject.cpp.

void print_modsel_params ( )
inherited

prints all parameter registered for model selection and their type

Definition at line 1084 of file SGObject.cpp.

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

prints registered parameters out

Parameters
prefixprefix for members

Definition at line 290 of file SGObject.cpp.

void remove_all_subsets ( )
virtualinherited

removes all subsets Calls subset_changed_post() afterwards

Reimplemented in CCombinedFeatures.

Definition at line 363 of file Features.cpp.

void remove_subset ( )
virtualinherited

removes that last added subset from subset stack, if existing Calls subset_changed_post() afterwards

Reimplemented in CCombinedFeatures.

Definition at line 357 of file Features.cpp.

bool reshape ( int32_t  num_features,
int32_t  num_vectors 
)
virtualinherited

in case there is a feature matrix allow for reshaping

NOT IMPLEMENTED!

Parameters
num_featuresnew number of features
num_vectorsnew number of vectors
Returns
if reshaping was successful

Reimplemented in CDenseFeatures< ST >, CDenseFeatures< uint32_t >, CDenseFeatures< float64_t >, CDenseFeatures< T >, and CDenseFeatures< uint16_t >.

Definition at line 208 of file Features.cpp.

void save ( CFile writer)
virtualinherited
bool save_serializable ( CSerializableFile file,
const char *  prefix = "",
int32_t  param_version = VERSION_PARAMETER 
)
virtualinherited

Save this object to file.

Parameters
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)
Returns
TRUE if done, otherwise FALSE

Reimplemented in CModelSelectionParameters.

Definition at line 296 of file SGObject.cpp.

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.

Exceptions
ShogunExceptionWill be thrown if an error occurres.

Reimplemented in CKernel.

Definition at line 1043 of file SGObject.cpp.

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.

Exceptions
ShogunExceptionWill be thrown if an error occurres.

Reimplemented in CKernel.

Definition at line 1038 of file SGObject.cpp.

void set_feature_vector ( SGMatrix< ST > const &  vec,
int32_t  num 
)

set feature vector num

Parameters
vecfeature vector
numindex of vector to set

Definition at line 126 of file MatrixFeatures.cpp.

void set_features ( SGMatrixList< ST >  features,
int32_t  num_feats 
)

set features

Parameters
featuresto set
num_featsnumber of features per vector

Definition at line 146 of file MatrixFeatures.cpp.

void set_generic< floatmax_t > ( )
inherited

set generic type to T

Definition at line 41 of file SGObject.cpp.

void set_global_io ( SGIO io)
inherited

set the io object

Parameters
ioio object to use

Definition at line 217 of file SGObject.cpp.

void set_global_parallel ( Parallel parallel)
inherited

set the parallel object

Parameters
parallelparallel object to use

Definition at line 230 of file SGObject.cpp.

void set_global_version ( Version version)
inherited

set the version object

Parameters
versionversion object to use

Definition at line 265 of file SGObject.cpp.

void set_preprocessed ( int32_t  num)
inherited

set applied flag for preprocessor

Parameters
numindex of preprocessor in list

Definition at line 188 of file Features.cpp.

void set_property ( EFeatureProperty  p)
inherited

set property

Parameters
pkernel property to set

Definition at line 341 of file Features.cpp.

virtual CSGObject* shallow_copy ( ) const
virtualinherited

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

Reimplemented in CGaussianKernel.

Definition at line 122 of file SGObject.h.

virtual void subset_changed_post ( )
virtualinherited

method may be overwritten to update things that depend on subset

Reimplemented in CStringFeatures< ST >, CStringFeatures< T >, CStringFeatures< uint8_t >, CStringFeatures< char >, and CStringFeatures< uint16_t >.

Definition at line 262 of file Features.h.

void unset_generic ( )
inherited

unset generic type

this has to be called in classes specializing a template class

Definition at line 285 of file SGObject.cpp.

void unset_property ( EFeatureProperty  p)
inherited

unset property

Parameters
pkernel property to unset

Definition at line 346 of file Features.cpp.

bool update_parameter_hash ( )
protectedvirtualinherited

Updates the hash of current parameter combination.

Returns
bool if parameter combination has changed since last update.

Definition at line 237 of file SGObject.cpp.

Member Data Documentation

SGIO* io
inherited

io

Definition at line 462 of file SGObject.h.

uint32_t m_hash
inherited

Hash of parameter values

Definition at line 480 of file SGObject.h.

Parameter* m_model_selection_parameters
inherited

model selection parameters

Definition at line 474 of file SGObject.h.

ParameterMap* m_parameter_map
inherited

map for different parameter versions

Definition at line 477 of file SGObject.h.

Parameter* m_parameters
inherited

parameters

Definition at line 471 of file SGObject.h.

CSubsetStack* m_subset_stack
protectedinherited

subset used for index transformations

Definition at line 296 of file Features.h.

Parallel* parallel
inherited

parallel

Definition at line 465 of file SGObject.h.

Version* version
inherited

version

Definition at line 468 of file SGObject.h.


The documentation for this class was generated from the following files:

SHOGUN Machine Learning Toolbox - Documentation