SHOGUN
4.1.0
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multiclass one vs one strategy used to train generic multiclass machines for K-class problems with building voting-based ensemble of K*(K-1) 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 28 of file MulticlassOneVsOneStrategy.h.
Public Member Functions | |
CMulticlassOneVsOneStrategy () | |
CMulticlassOneVsOneStrategy (EProbHeuristicType prob_heuris) | |
virtual | ~CMulticlassOneVsOneStrategy () |
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 int32_t | get_num_machines () |
virtual const char * | get_name () const |
virtual void | rescale_outputs (SGVector< float64_t > outputs) |
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 () |
virtual SGVector< index_t > | decide_label_multiple_output (SGVector< float64_t > outputs, int32_t n_outputs) |
EProbHeuristicType | get_prob_heuris_type () |
void | set_prob_heuris_type (EProbHeuristicType prob_heuris) |
virtual void | rescale_outputs (SGVector< float64_t > outputs, const SGVector< float64_t > As, const SGVector< float64_t > Bs) |
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 () |
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void | set_generic () |
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void | set_generic () |
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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) |
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_price (SGVector< float64_t > outputs, const SGVector< int32_t > indx1, const SGVector< int32_t > indx2) |
void | rescale_heuris_hastie (SGVector< float64_t > outputs, const SGVector< int32_t > indx1, const SGVector< int32_t > indx2) |
void | rescale_heuris_hamamura (SGVector< float64_t > outputs, const SGVector< int32_t > indx1, const SGVector< int32_t > indx2) |
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 Attributes | |
int32_t | m_num_machines |
number of machines More... | |
int32_t | m_train_pair_idx_1 |
1st index of current submachine being trained More... | |
int32_t | m_train_pair_idx_2 |
2nd index of current submachine being trained More... | |
SGVector< int32_t > | m_num_samples |
number of samples per machine More... | |
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 19 of file MulticlassOneVsOneStrategy.cpp.
CMulticlassOneVsOneStrategy | ( | EProbHeuristicType | prob_heuris | ) |
constructor
prob_heuris | probability estimation heuristic |
Definition at line 25 of file MulticlassOneVsOneStrategy.cpp.
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destructor
Definition at line 40 of file MulticlassOneVsOneStrategy.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 597 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 714 of file SGObject.cpp.
decide the final label.
outputs | a vector of output from each machine (in that order) |
Implements CMulticlassStrategy.
Definition at line 89 of file MulticlassOneVsOneStrategy.cpp.
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virtualinherited |
decide the final label.
outputs | a vector of output from each machine (in that order) |
n_outputs | number of outputs |
Reimplemented in CMulticlassOneVsRestStrategy.
Definition at line 119 of file MulticlassStrategy.h.
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virtualinherited |
A deep copy. All the instance variables will also be copied.
Definition at line 198 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 618 of file SGObject.cpp.
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Definition at line 498 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 522 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 535 of file SGObject.cpp.
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get name
Reimplemented from CMulticlassStrategy.
Definition at line 66 of file MulticlassOneVsOneStrategy.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 60 of file MulticlassOneVsOneStrategy.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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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 296 of file SGObject.cpp.
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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 369 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 426 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 421 of file SGObject.cpp.
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Definition at line 262 of file SGObject.cpp.
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prints all parameter registered for model selection and their type
Definition at line 474 of file SGObject.cpp.
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prints registered parameters out
prefix | prefix for members |
Definition at line 308 of file SGObject.cpp.
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OVO Hamamura's heuristic see [1]
outputs | a vector of output from each machine (in that order) |
indx1 | indices of 1st involved class of training machines |
indx2 | indices of 2nd involved class of training machines |
Definition at line 293 of file MulticlassOneVsOneStrategy.cpp.
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OVO Hastie's heuristic see [1]
outputs | a vector of output from each machine (in that order) |
indx1 | indices of 1st involved class of training machines |
indx2 | indices of 2nd involved class of training machines |
Definition at line 217 of file MulticlassOneVsOneStrategy.cpp.
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OVO Price's heuristic see [1]
outputs | a vector of output from each machine (in that order) |
indx1 | indices of 1st involved class of training machines |
indx2 | indices of 2nd involved class of training machines |
Definition at line 185 of file MulticlassOneVsOneStrategy.cpp.
rescale multiclass outputs according to the selected heuristic
outputs | a vector of output from each machine (in that order) which will be resized to length of num_classes if heuristic is set |
Reimplemented from CMulticlassStrategy.
Definition at line 144 of file MulticlassOneVsOneStrategy.cpp.
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rescale multiclass outputs according to the selected heuristic this function only being called with OVA_SOFTMAX heuristic the CStatistics::fit_sigmoid() should be called first
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 in CMulticlassOneVsRestStrategy.
Definition at line 160 of file MulticlassStrategy.h.
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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 314 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 436 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 431 of file SGObject.cpp.
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Definition at line 41 of file SGObject.cpp.
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Definition at line 46 of file SGObject.cpp.
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Definition at line 51 of file SGObject.cpp.
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Definition at line 56 of file SGObject.cpp.
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Definition at line 61 of file SGObject.cpp.
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Definition at line 66 of file SGObject.cpp.
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Definition at line 71 of file SGObject.cpp.
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Definition at line 76 of file SGObject.cpp.
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Definition at line 81 of file SGObject.cpp.
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Definition at line 86 of file SGObject.cpp.
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Definition at line 91 of file SGObject.cpp.
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Definition at line 96 of file SGObject.cpp.
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Definition at line 101 of file SGObject.cpp.
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Definition at line 106 of file SGObject.cpp.
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Definition at line 111 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 241 of file SGObject.cpp.
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set the version object
version | version object to use |
Definition at line 283 of file SGObject.cpp.
void set_num_classes | ( | int32_t | num_classes | ) |
set the number of classes, since the number of machines totally depends on the number of classes, which will also be set.
num_classes | number of classes |
Definition at line 81 of file MulticlassOneVsOneStrategy.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 192 of file SGObject.cpp.
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has more training phase
Implements CMulticlassStrategy.
Definition at line 48 of file MulticlassOneVsOneStrategy.cpp.
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prepare for the next training phase.
Reimplemented from CMulticlassStrategy.
Definition at line 53 of file MulticlassOneVsOneStrategy.cpp.
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start training
Reimplemented from CMulticlassStrategy.
Definition at line 37 of file MulticlassOneVsOneStrategy.cpp.
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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 303 of file SGObject.cpp.
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Updates the hash of current parameter combination
Definition at line 248 of file SGObject.cpp.
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io
Definition at line 369 of file SGObject.h.
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parameters wrt which we can compute gradients
Definition at line 384 of file SGObject.h.
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Hash of parameter values
Definition at line 387 of file SGObject.h.
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model selection parameters
Definition at line 381 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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number of machines
Definition at line 117 of file MulticlassOneVsOneStrategy.h.
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number of samples per machine
Definition at line 120 of file MulticlassOneVsOneStrategy.h.
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original multiclass labels
Definition at line 174 of file MulticlassStrategy.h.
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parameters
Definition at line 378 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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1st index of current submachine being trained
Definition at line 118 of file MulticlassOneVsOneStrategy.h.
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2nd index of current submachine being trained
Definition at line 119 of file MulticlassOneVsOneStrategy.h.
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parallel
Definition at line 372 of file SGObject.h.
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version
Definition at line 375 of file SGObject.h.