SHOGUN
4.2.0
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multiclass one vs rest strategy used to train generic multiclass machines for K-class problems with building ensemble of K binary classifiers
multiclass probabilistic outputs can be obtained by using the heuristics described in [1]
[1] J. Milgram, M. Cheriet, R.Sabourin, "One Against One" or "One Against One": Which One is Better for Handwriting Recognition with SVMs?
Definition at line 33 of file MulticlassOneVsRestStrategy.h.
Public Member Functions | |
CMulticlassOneVsRestStrategy () | |
CMulticlassOneVsRestStrategy (EProbHeuristicType prob_heuris) | |
virtual | ~CMulticlassOneVsRestStrategy () |
virtual void | train_start (CMulticlassLabels *orig_labels, CBinaryLabels *train_labels) |
virtual bool | train_has_more () |
virtual SGVector< int32_t > | train_prepare_next () |
virtual int32_t | decide_label (SGVector< float64_t > outputs) |
virtual SGVector< index_t > | decide_label_multiple_output (SGVector< float64_t > outputs, int32_t n_outputs) |
virtual int32_t | get_num_machines () |
virtual const char * | get_name () const |
virtual void | rescale_outputs (SGVector< float64_t > outputs) |
virtual void | rescale_outputs (SGVector< float64_t > outputs, const SGVector< float64_t > As, const SGVector< float64_t > Bs) |
void | set_num_classes (int32_t num_classes) |
int32_t | get_num_classes () const |
CRejectionStrategy * | get_rejection_strategy () |
void | set_rejection_strategy (CRejectionStrategy *rejection_strategy) |
virtual void | train_stop () |
EProbHeuristicType | get_prob_heuris_type () |
void | set_prob_heuris_type (EProbHeuristicType prob_heuris) |
virtual CSGObject * | shallow_copy () const |
virtual CSGObject * | deep_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="") |
virtual bool | load_serializable (CSerializableFile *file, const char *prefix="") |
void | set_global_io (SGIO *io) |
SGIO * | get_global_io () |
void | set_global_parallel (Parallel *parallel) |
Parallel * | get_global_parallel () |
void | set_global_version (Version *version) |
Version * | get_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) |
bool | has (const std::string &name) const |
template<typename T > | |
bool | has (const Tag< T > &tag) const |
template<typename T , typename U = void> | |
bool | has (const std::string &name) const |
template<typename T > | |
void | set (const Tag< T > &_tag, const T &value) |
template<typename T , typename U = void> | |
void | set (const std::string &name, const T &value) |
template<typename T > | |
T | get (const Tag< T > &_tag) const |
template<typename T , typename U = void> | |
T | get (const std::string &name) const |
virtual void | update_parameter_hash () |
virtual bool | parameter_hash_changed () |
virtual bool | equals (CSGObject *other, float64_t accuracy=0.0, bool tolerant=false) |
virtual CSGObject * | clone () |
Public Attributes | |
SGIO * | io |
Parallel * | parallel |
Version * | version |
Parameter * | m_parameters |
Parameter * | m_model_selection_parameters |
Parameter * | m_gradient_parameters |
uint32_t | m_hash |
Protected Member Functions | |
void | rescale_heuris_norm (SGVector< float64_t > outputs) |
void | rescale_heuris_softmax (SGVector< float64_t > outputs, const SGVector< float64_t > As, const SGVector< float64_t > Bs) |
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) |
template<typename T > | |
void | register_param (Tag< T > &_tag, const T &value) |
template<typename T > | |
void | register_param (const std::string &name, const T &value) |
Protected Attributes | |
CRejectionStrategy * | m_rejection_strategy |
rejection strategy More... | |
CBinaryLabels * | m_train_labels |
labels used to train the submachines More... | |
CMulticlassLabels * | m_orig_labels |
original multiclass labels More... | |
int32_t | m_train_iter |
index of current iterations More... | |
int32_t | m_num_classes |
number of classes in this problem More... | |
EProbHeuristicType | m_prob_heuris |
prob output heuristic More... | |
constructor
Definition at line 18 of file MulticlassOneVsRestStrategy.cpp.
CMulticlassOneVsRestStrategy | ( | EProbHeuristicType | prob_heuris | ) |
constructor
prob_heuris | probability estimation heuristic |
Definition at line 23 of file MulticlassOneVsRestStrategy.cpp.
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destructor
Definition at line 45 of file MulticlassOneVsRestStrategy.h.
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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.
dict | dictionary of parameters to be built. |
Definition at line 630 of file SGObject.cpp.
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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.
Definition at line 747 of file SGObject.cpp.
decide the final label.
outputs | a vector of output from each machine (in that order) |
Implements CMulticlassStrategy.
Definition at line 44 of file MulticlassOneVsRestStrategy.cpp.
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virtual |
decide the final label.
outputs | a vector of output from each machine (in that order) |
n_outputs | number of outputs |
Reimplemented from CMulticlassStrategy.
Definition at line 52 of file MulticlassOneVsRestStrategy.cpp.
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virtualinherited |
A deep copy. All the instance variables will also be copied.
Definition at line 231 of file SGObject.cpp.
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.
other | object to compare with |
accuracy | accuracy to use for comparison (optional) |
tolerant | allows linient check on float equality (within accuracy) |
Definition at line 651 of file SGObject.cpp.
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Getter for a class parameter, identified by a Tag. Throws an exception if the class does not have such a parameter.
_tag | name and type information of parameter |
Definition at line 367 of file SGObject.h.
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Getter for a class parameter, identified by a name. Throws an exception if the class does not have such a parameter.
name | name of the parameter |
Definition at line 388 of file SGObject.h.
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Definition at line 531 of file SGObject.cpp.
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Returns description of a given parameter string, if it exists. SG_ERROR otherwise
param_name | name of the parameter |
Definition at line 555 of file SGObject.cpp.
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Returns index of model selection parameter with provided index
param_name | name of model selection parameter |
Definition at line 568 of file SGObject.cpp.
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get name
Reimplemented from CMulticlassStrategy.
Definition at line 83 of file MulticlassOneVsRestStrategy.h.
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get number of classes
Definition at line 76 of file MulticlassStrategy.h.
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get number of machines used in this strategy.
Implements CMulticlassStrategy.
Definition at line 77 of file MulticlassOneVsRestStrategy.h.
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get prob output heuristic type
Definition at line 130 of file MulticlassStrategy.h.
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get rejection strategy
Definition at line 82 of file MulticlassStrategy.h.
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Checks if object has a class parameter identified by a name.
name | name of the parameter |
Definition at line 289 of file SGObject.h.
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Checks if object has a class parameter identified by a Tag.
tag | tag of the parameter containing name and type information |
Definition at line 301 of file SGObject.h.
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Checks if a type exists for a class parameter identified by a name.
name | name of the parameter |
Definition at line 312 of file SGObject.h.
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virtualinherited |
If the SGSerializable is a class template then TRUE will be returned and GENERIC is set to the type of the generic.
generic | set to the type of the generic if returning TRUE |
Definition at line 329 of file SGObject.cpp.
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virtualinherited |
Load this object from file. If it will fail (returning FALSE) then this object will contain inconsistent data and should not be used!
file | where to load from |
prefix | prefix for members |
Definition at line 402 of file SGObject.cpp.
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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.
ShogunException | will be thrown if an error occurs. |
Reimplemented in CKernel, CWeightedDegreePositionStringKernel, CList, CAlphabet, CLinearHMM, CGaussianKernel, CInverseMultiQuadricKernel, CCircularKernel, and CExponentialKernel.
Definition at line 459 of file SGObject.cpp.
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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.
ShogunException | will be thrown if an error occurs. |
Reimplemented in CDynamicArray< T >, CDynamicArray< float64_t >, CDynamicArray< float32_t >, CDynamicArray< int32_t >, CDynamicArray< char >, CDynamicArray< bool >, and CDynamicObjectArray.
Definition at line 454 of file SGObject.cpp.
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virtualinherited |
Definition at line 295 of file SGObject.cpp.
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prints all parameter registered for model selection and their type
Definition at line 507 of file SGObject.cpp.
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prints registered parameters out
prefix | prefix for members |
Definition at line 341 of file SGObject.cpp.
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protectedinherited |
Registers a class parameter which is identified by a tag. This enables the parameter to be modified by set() and retrieved by get(). Parameters can be registered in the constructor of the class.
_tag | name and type information of parameter |
value | value of the parameter |
Definition at line 439 of file SGObject.h.
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protectedinherited |
Registers a class parameter which is identified by a name. This enables the parameter to be modified by set() and retrieved by get(). Parameters can be registered in the constructor of the class.
name | name of the parameter |
value | value of the parameter along with type information |
Definition at line 452 of file SGObject.h.
OVA normalization heuristic
outputs | a vector of output from each machine (in that order) |
Definition at line 97 of file MulticlassOneVsRestStrategy.cpp.
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protected |
OVA softmax heuristic
outputs | a vector of output from each machine (in that order) |
As | fitted sigmoid parameters a one for each machine |
Bs | fitted sigmoid parameters b one for each machine |
Definition at line 111 of file MulticlassOneVsRestStrategy.cpp.
rescale multiclass outputs according to the selected heuristic
outputs | a vector of output from each machine (in that order) |
Reimplemented from CMulticlassStrategy.
Definition at line 70 of file MulticlassOneVsRestStrategy.cpp.
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virtual |
rescale multiclass outputs according to the selected heuristic this function only being called with OVA_SOFTMAX heuristic
outputs | a vector of output from each machine (in that order) |
As | fitted sigmoid parameters a one for each machine |
Bs | fitted sigmoid parameters b one for each machine |
Reimplemented from CMulticlassStrategy.
Definition at line 88 of file MulticlassOneVsRestStrategy.cpp.
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Save this object to file.
file | where to save the object; will be closed during returning if PREFIX is an empty string. |
prefix | prefix for members |
Definition at line 347 of file SGObject.cpp.
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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.
ShogunException | will be thrown if an error occurs. |
Reimplemented in CKernel.
Definition at line 469 of file SGObject.cpp.
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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.
ShogunException | will be thrown if an error occurs. |
Reimplemented in CKernel, CDynamicArray< T >, CDynamicArray< float64_t >, CDynamicArray< float32_t >, CDynamicArray< int32_t >, CDynamicArray< char >, CDynamicArray< bool >, and CDynamicObjectArray.
Definition at line 464 of file SGObject.cpp.
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Setter for a class parameter, identified by a Tag. Throws an exception if the class does not have such a parameter.
_tag | name and type information of parameter |
value | value of the parameter |
Definition at line 328 of file SGObject.h.
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inherited |
Setter for a class parameter, identified by a name. Throws an exception if the class does not have such a parameter.
name | name of the parameter |
value | value of the parameter along with type information |
Definition at line 354 of file SGObject.h.
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Definition at line 74 of file SGObject.cpp.
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Definition at line 79 of file SGObject.cpp.
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Definition at line 84 of file SGObject.cpp.
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Definition at line 89 of file SGObject.cpp.
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Definition at line 94 of file SGObject.cpp.
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Definition at line 99 of file SGObject.cpp.
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Definition at line 104 of file SGObject.cpp.
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Definition at line 109 of file SGObject.cpp.
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Definition at line 114 of file SGObject.cpp.
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Definition at line 119 of file SGObject.cpp.
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Definition at line 124 of file SGObject.cpp.
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Definition at line 129 of file SGObject.cpp.
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Definition at line 134 of file SGObject.cpp.
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Definition at line 139 of file SGObject.cpp.
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Definition at line 144 of file SGObject.cpp.
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set generic type to T
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set the parallel object
parallel | parallel object to use |
Definition at line 274 of file SGObject.cpp.
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set the version object
version | version object to use |
Definition at line 316 of file SGObject.cpp.
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set number of classes
Definition at line 70 of file MulticlassStrategy.h.
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set prob output heuristic type
prob_heuris | type of probability heuristic |
Definition at line 138 of file MulticlassStrategy.h.
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set rejection strategy
Definition at line 89 of file MulticlassStrategy.h.
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A shallow copy. All the SGObject instance variables will be simply assigned and SG_REF-ed.
Reimplemented in CGaussianKernel.
Definition at line 225 of file SGObject.cpp.
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has more training phase
Implements CMulticlassStrategy.
Definition at line 54 of file MulticlassOneVsRestStrategy.h.
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prepare for the next training phase.
Reimplemented from CMulticlassStrategy.
Definition at line 28 of file MulticlassOneVsRestStrategy.cpp.
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start training
Reimplemented from CMulticlassStrategy.
Definition at line 48 of file MulticlassOneVsRestStrategy.h.
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finish training, release resources
Definition at line 63 of file MulticlassStrategy.cpp.
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unset generic type
this has to be called in classes specializing a template class
Definition at line 336 of file SGObject.cpp.
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Updates the hash of current parameter combination
Definition at line 281 of file SGObject.cpp.
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io
Definition at line 537 of file SGObject.h.
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parameters wrt which we can compute gradients
Definition at line 552 of file SGObject.h.
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Hash of parameter values
Definition at line 555 of file SGObject.h.
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model selection parameters
Definition at line 549 of file SGObject.h.
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number of classes in this problem
Definition at line 176 of file MulticlassStrategy.h.
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original multiclass labels
Definition at line 174 of file MulticlassStrategy.h.
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parameters
Definition at line 546 of file SGObject.h.
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prob output heuristic
Definition at line 177 of file MulticlassStrategy.h.
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rejection strategy
Definition at line 172 of file MulticlassStrategy.h.
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index of current iterations
Definition at line 175 of file MulticlassStrategy.h.
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labels used to train the submachines
Definition at line 173 of file MulticlassStrategy.h.
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parallel
Definition at line 540 of file SGObject.h.
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version
Definition at line 543 of file SGObject.h.