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CHMSVMModel Class Reference

Detailed Description

Class CHMSVMModel that represents the application specific model and contains the application dependent logic to solve Hidden Markov Support Vector Machines (HM-SVM) type of problems within a generic SO framework.

Definition at line 31 of file HMSVMModel.h.

Inheritance diagram for CHMSVMModel:
Inheritance graph
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Public Member Functions

 CHMSVMModel ()
 
 CHMSVMModel (CFeatures *features, CStructuredLabels *labels, EStateModelType smt, int32_t num_obs=0, bool use_plifs=false)
 
virtual ~CHMSVMModel ()
 
virtual int32_t get_dim () const
 
virtual SGVector< float64_t > get_joint_feature_vector (int32_t feat_idx, CStructuredData *y)
 
virtual CResultSet * argmax (SGVector< float64_t > w, int32_t feat_idx, bool const training=true)
 
virtual float64_t delta_loss (CStructuredData *y1, CStructuredData *y2)
 
virtual void init_primal_opt (float64_t regularization, SGMatrix< float64_t > &A, SGVector< float64_t > a, SGMatrix< float64_t > B, SGVector< float64_t > &b, SGVector< float64_t > &lb, SGVector< float64_t > &ub, SGMatrix< float64_t > &C)
 
virtual bool check_training_setup () const
 
virtual int32_t get_num_aux () const
 
virtual int32_t get_num_aux_con () const
 
void set_use_plifs (bool use_plifs)
 
virtual void init_training ()
 
SGMatrix< float64_t > get_transmission_weights () const
 
SGVector< float64_t > get_emission_weights () const
 
CStateModel * get_state_model () const
 
virtual const char * get_name () const
 
void set_labels (CStructuredLabels *labs)
 
CStructuredLabels * get_labels ()
 
virtual CStructuredLabels * structured_labels_factory (int32_t num_labels=0)
 
void set_features (CFeatures *feats)
 
CFeatures * get_features ()
 
SGVector< float64_t > get_joint_feature_vector (int32_t feat_idx, int32_t lab_idx)
 
SGSparseVector< float64_t > get_sparse_joint_feature_vector (int32_t feat_idx, int32_t lab_idx)
 
virtual SGSparseVector< float64_t > get_sparse_joint_feature_vector (int32_t feat_idx, CStructuredData *y)
 
float64_t delta_loss (int32_t ytrue_idx, CStructuredData *ypred)
 
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)
 
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

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

CStructuredLabels * m_labels
 
CFeatures * m_features
 

Constructor & Destructor Documentation

CHMSVMModel ( )

default constructor

Definition at line 20 of file HMSVMModel.cpp.

CHMSVMModel ( CFeatures *  features,
CStructuredLabels *  labels,
EStateModelType  smt,
int32_t  num_obs = 0,
bool  use_plifs = false 
)

constructor

Parameters
featuresthe feature vectors, must be of type MatrixFeatures
labelssequence labels
smtinternal state representation
num_obsnumber of observations
use_plifswhether to model the observations using PLiFs

Definition at line 26 of file HMSVMModel.cpp.

~CHMSVMModel ( )
virtual

destructor

Definition at line 45 of file HMSVMModel.cpp.

Member Function Documentation

CResultSet * argmax ( SGVector< float64_t >  w,
int32_t  feat_idx,
bool const  training = true 
)
virtual

obtains the argmax of \( \Delta(y_{pred}, y_{truth}) + \langle w, \Psi(x_{truth}, y_{pred}) \rangle \)

Parameters
wweight vector
feat_idxindex of the feature to compute the argmax
trainingtrue if argmax is called during training. Then, it is assumed that the label indexed by feat_idx in m_labels corresponds to the true label of the corresponding feature vector.
Returns
structure with the predicted output

Implements CStructuredModel.

Definition at line 160 of file HMSVMModel.cpp.

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.

Parameters
dictdictionary of parameters to be built.

Definition at line 597 of file SGObject.cpp.

bool check_training_setup ( ) const
virtual

method to be called from a SO machine before training to ensure that the training data is valid

Reimplemented from CStructuredModel.

Definition at line 442 of file HMSVMModel.cpp.

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.

Returns
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

Definition at line 714 of file SGObject.cpp.

CSGObject * deep_copy ( ) const
virtualinherited

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

Definition at line 198 of file SGObject.cpp.

float64_t delta_loss ( CStructuredData *  y1,
CStructuredData *  y2 
)
virtual

computes \( \Delta(y_{1}, y_{2}) \)

Parameters
y1an instance of structured data
y2another instance of structured data
Returns
loss value

Reimplemented from CStructuredModel.

Definition at line 348 of file HMSVMModel.cpp.

float64_t delta_loss ( int32_t  ytrue_idx,
CStructuredData *  ypred 
)
inherited

computes \( \Delta(y_{\text{true}}, y_{\text{pred}}) \)

Parameters
ytrue_idxindex of the true label in labels
ypredthe predicted label
Returns
loss value

Definition at line 147 of file StructuredModel.cpp.

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.

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

Definition at line 618 of file SGObject.cpp.

int32_t get_dim ( ) const
virtual

return the dimensionality of the joint feature space, i.e. the dimension of the weight vector \(w\)

Implements CStructuredModel.

Definition at line 51 of file HMSVMModel.cpp.

SGVector< float64_t > get_emission_weights ( ) const

get emission weights

Returns
vector with the emission weights

Definition at line 604 of file HMSVMModel.cpp.

CFeatures * get_features ( )
inherited

get features

Returns
features

Definition at line 99 of file StructuredModel.cpp.

SGIO * get_global_io ( )
inherited

get the io object

Returns
io object

Definition at line 235 of file SGObject.cpp.

Parallel * get_global_parallel ( )
inherited

get the parallel object

Returns
parallel object

Definition at line 277 of file SGObject.cpp.

Version * get_global_version ( )
inherited

get the version object

Returns
version object

Definition at line 290 of file SGObject.cpp.

SGVector< float64_t > get_joint_feature_vector ( int32_t  feat_idx,
CStructuredData *  y 
)
virtual

get joint feature vector

\[ \vec{\Psi}(\bf{x}_\text{feat\_idx}, \bf{y}) \]

Parameters
feat_idxindex of the feature vector to use
ystructured label to use
Returns
the joint feature vector

Reimplemented from CStructuredModel.

Definition at line 64 of file HMSVMModel.cpp.

SGVector< float64_t > get_joint_feature_vector ( int32_t  feat_idx,
int32_t  lab_idx 
)
inherited

gets joint feature vector

\[ \vec{\Psi}(\bf{x}_\text{feat\_idx}, \bf{y}_\text{lab\_idx}) \]

Parameters
feat_idxindex of the feature vector to use
lab_idxindex of the structured label to use
Returns
the joint feature vector

Definition at line 105 of file StructuredModel.cpp.

CStructuredLabels * get_labels ( )
inherited

get labels

Returns
labels

Definition at line 86 of file StructuredModel.cpp.

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

Definition at line 498 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 522 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 535 of file SGObject.cpp.

virtual const char* get_name ( ) const
virtual

return the SGSerializable's name

Returns
name Gaussian

Reimplemented from CStructuredModel.

Definition at line 173 of file HMSVMModel.h.

int32_t get_num_aux ( ) const
virtual

get the number of auxiliary variables to introduce in the optimization problem. The auxiliary variables are used to implement smoothness regularization between adjacent emission scores via constraints.

Returns
the number of auxiliary variables

Reimplemented from CStructuredModel.

Definition at line 508 of file HMSVMModel.cpp.

int32_t get_num_aux_con ( ) const
virtual

get the number of auxiliary constraints to introduce in the optimization problem. These constraints are used to implement smoothness regularization between adjacent emission scores.

Returns
the number of auxiliary constraints

Reimplemented from CStructuredModel.

Definition at line 513 of file HMSVMModel.cpp.

SGSparseVector< float64_t > get_sparse_joint_feature_vector ( int32_t  feat_idx,
int32_t  lab_idx 
)
inherited

gets joint feature vector

\[ \vec{\Psi}(\bf{x}_\text{feat\_idx}, \bf{y}_\text{lab\_idx}) \]

Parameters
feat_idxindex of the feature vector to use
lab_idxindex of the structured label to use
Returns
the joint feature vector

Definition at line 126 of file StructuredModel.cpp.

SGSparseVector< float64_t > get_sparse_joint_feature_vector ( int32_t  feat_idx,
CStructuredData *  y 
)
virtualinherited

get joint feature vector

\[ \vec{\Psi}(\bf{x}_\text{feat\_idx}, \bf{y}) \]

Parameters
feat_idxindex of the feature vector to use
ystructured label to use
Returns
the joint feature vector

Reimplemented in CHashedMultilabelModel.

Definition at line 137 of file StructuredModel.cpp.

CStateModel * get_state_model ( ) const

get state model

Returns
model with the description of the states

Definition at line 609 of file HMSVMModel.cpp.

SGMatrix< float64_t > get_transmission_weights ( ) const

get transmission weights

Returns
vector with the transmission weights

Definition at line 599 of file HMSVMModel.cpp.

void init_primal_opt ( float64_t  regularization,
SGMatrix< float64_t > &  A,
SGVector< float64_t >  a,
SGMatrix< float64_t >  B,
SGVector< float64_t > &  b,
SGVector< float64_t > &  lb,
SGVector< float64_t > &  ub,
SGMatrix< float64_t > &  C 
)
virtual

initialize the optimization problem

Parameters
regularizationregularization strength
Ais [-dPsi(y) | -I_N ] with M+N columns => max. M+1 nnz per row
a
B
brhs of the equality constraints
bupper bounds of the constraints, Ax <= b
lblower bound for the weight vector
ubupper bound for the weight vector
Cregularization matrix, w'Cw

Reimplemented from CStructuredModel.

Definition at line 357 of file HMSVMModel.cpp.

void init_training ( )
virtual

initializes the emission and transmission vectors of weights used in Viterbi decoding. In case PLiFs are used, it also initializes the matrix of PLiFs and automatically selects the supporting points based on the feature values

Reimplemented from CStructuredModel.

Definition at line 523 of file HMSVMModel.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 296 of file SGObject.cpp.

bool load_serializable ( CSerializableFile *  file,
const char *  prefix = "" 
)
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
Returns
TRUE if done, otherwise FALSE

Definition at line 369 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 occurs.

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

Definition at line 426 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 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.

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

Definition at line 262 of file SGObject.cpp.

void print_modsel_params ( )
inherited

prints all parameter registered for model selection and their type

Definition at line 474 of file SGObject.cpp.

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

prints registered parameters out

Parameters
prefixprefix for members

Definition at line 308 of file SGObject.cpp.

bool save_serializable ( CSerializableFile *  file,
const char *  prefix = "" 
)
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
Returns
TRUE if done, otherwise FALSE

Definition at line 314 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 occurs.

Reimplemented in CKernel.

Definition at line 436 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 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.

void set_features ( CFeatures *  feats)
inherited

set features

Parameters
featsfeatures

Definition at line 92 of file StructuredModel.cpp.

void set_generic ( )
inherited

Definition at line 41 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 46 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 51 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 56 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 61 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 66 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 71 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 76 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 81 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 86 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 91 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 96 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 101 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 106 of file SGObject.cpp.

void set_generic ( )
inherited

Definition at line 111 of file SGObject.cpp.

void set_generic ( )
inherited

set generic type to T

void set_global_io ( SGIO *  io)
inherited

set the io object

Parameters
ioio object to use

Definition at line 228 of file SGObject.cpp.

void set_global_parallel ( Parallel *  parallel)
inherited

set the parallel object

Parameters
parallelparallel object to use

Definition at line 241 of file SGObject.cpp.

void set_global_version ( Version *  version)
inherited

set the version object

Parameters
versionversion object to use

Definition at line 283 of file SGObject.cpp.

void set_labels ( CStructuredLabels *  labs)
inherited

set labels

Parameters
labslabels

Definition at line 79 of file StructuredModel.cpp.

void set_use_plifs ( bool  use_plifs)

setter for use_plifs

Parameters
use_plifswhether PLiFs shall be used

Definition at line 518 of file HMSVMModel.cpp.

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 192 of file SGObject.cpp.

CStructuredLabels * structured_labels_factory ( int32_t  num_labels = 0)
virtualinherited

create empty StructuredLabels object

Reimplemented in CHierarchicalMultilabelModel, CHashedMultilabelModel, CMulticlassModel, CMultilabelCLRModel, and CMultilabelModel.

Definition at line 34 of file StructuredModel.cpp.

void unset_generic ( )
inherited

unset generic type

this has to be called in classes specializing a template class

Definition at line 303 of file SGObject.cpp.

void update_parameter_hash ( )
virtualinherited

Updates the hash of current parameter combination

Definition at line 248 of file SGObject.cpp.

Member Data Documentation

SGIO* io
inherited

io

Definition at line 369 of file SGObject.h.

CFeatures* m_features
protectedinherited

feature vectors

Definition at line 308 of file StructuredModel.h.

Parameter* m_gradient_parameters
inherited

parameters wrt which we can compute gradients

Definition at line 384 of file SGObject.h.

uint32_t m_hash
inherited

Hash of parameter values

Definition at line 387 of file SGObject.h.

CStructuredLabels* m_labels
protectedinherited

structured labels

Definition at line 305 of file StructuredModel.h.

Parameter* m_model_selection_parameters
inherited

model selection parameters

Definition at line 381 of file SGObject.h.

Parameter* m_parameters
inherited

parameters

Definition at line 378 of file SGObject.h.

Parallel* parallel
inherited

parallel

Definition at line 372 of file SGObject.h.

Version* version
inherited

version

Definition at line 375 of file SGObject.h.

The documentation for this class was generated from the following files:
SHOGUN Machine Learning Toolbox - Documentation