Binary Labels for binary classification.
valid values for labels are +1/-1
Scores may be converted into calibrated probabilities using scores_to_probabilities(), which implements the method described in Lin, H., Lin, C., and Weng, R. (2007). A note on Platt's probabilistic outputs for support vector machines. Should only be used in conjunction with SVM.
在文件 BinaryLabels.h 第 36 行定义.
Public 成员函数 | |
CBinaryLabels () | |
CBinaryLabels (int32_t num_labels) | |
CBinaryLabels (SGVector< int32_t > src) | |
CBinaryLabels (SGVector< int64_t > src) | |
CBinaryLabels (SGVector< float64_t > src, float64_t threshold=0.0) | |
CBinaryLabels (CFile *loader) | |
virtual void | ensure_valid (const char *context=NULL) |
virtual ELabelType | get_label_type () const |
void | scores_to_probabilities (float64_t a=0, float64_t b=0) |
virtual const char * | get_name () const |
virtual void | load (CFile *loader) |
virtual void | save (CFile *writer) |
bool | set_label (int32_t idx, float64_t label) |
bool | set_int_label (int32_t idx, int32_t label) |
float64_t | get_label (int32_t idx) |
int32_t | get_int_label (int32_t idx) |
SGVector< float64_t > | get_labels () |
SGVector< float64_t > | get_labels_copy () |
void | set_labels (SGVector< float64_t > v) |
void | set_to_one () |
void | zero () |
void | set_to_const (float64_t c) |
SGVector< int32_t > | get_int_labels () |
void | set_int_labels (SGVector< int32_t > labels) |
void | set_int_labels (SGVector< int64_t > labels) |
virtual int32_t | get_num_labels () const |
virtual void | add_subset (SGVector< index_t > subset) |
virtual void | remove_subset () |
virtual void | remove_all_subsets () |
virtual void | set_value (float64_t value, int32_t idx) |
virtual float64_t | get_value (int32_t idx) |
virtual void | set_values (SGVector< float64_t > values) |
virtual SGVector< float64_t > | get_values () |
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="", 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) |
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 bool | update_parameter_hash () |
virtual bool | equals (CSGObject *other, float64_t accuracy=0.0) |
virtual CSGObject * | clone () |
Public 属性 | |
SGIO * | io |
Parallel * | parallel |
Version * | version |
Parameter * | m_parameters |
Parameter * | m_model_selection_parameters |
Parameter * | m_gradient_parameters |
ParameterMap * | m_parameter_map |
uint32_t | m_hash |
静态 Public 属性 | |
static const int32_t | REJECTION_LABEL = -2 |
Protected 成员函数 | |
virtual TParameter * | migrate (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 | |
SGVector< float64_t > | m_labels |
CSubsetStack * | m_subset_stack |
SGVector< float64_t > | m_current_values |
CBinaryLabels | ( | ) |
default constructor
在文件 BinaryLabels.cpp 第 7 行定义.
CBinaryLabels | ( | int32_t | num_labels | ) |
CBinaryLabels | ( | SGVector< int32_t > | src | ) |
CBinaryLabels | ( | SGVector< int64_t > | src | ) |
constructor sets labels with src elements (int64 version)
src | labels to set |
在文件 BinaryLabels.cpp 第 25 行定义.
CBinaryLabels | ( | SGVector< float64_t > | src, |
float64_t | threshold = 0.0 |
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constructor sets values from src vector sets labels with sign of src elements with added threshold
src | labels to set |
threshold | threshold |
在文件 BinaryLabels.cpp 第 35 行定义.
CBinaryLabels | ( | CFile * | loader | ) |
adds a subset of indices on top of the current subsets (possibly subset of subset. Calls subset_changed_post() afterwards
subset | subset of indices to add |
在文件 Labels.cpp 第 40 行定义.
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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.
dict | dictionary of parameters to be built. |
在文件 SGObject.cpp 第 1195 行定义.
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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.
在文件 SGObject.cpp 第 1312 行定义.
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virtualinherited |
A deep copy. All the instance variables will also be copied.
在文件 SGObject.h 第 159 行定义.
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Make sure the label is valid, otherwise raise SG_ERROR.
possible with subset
context | optional message to convey the context |
重载 CDenseLabels .
在文件 BinaryLabels.cpp 第 48 行定义.
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) |
在文件 SGObject.cpp 第 1216 行定义.
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get INT label
possible with subset
idx | index of label to get |
在文件 DenseLabels.cpp 第 191 行定义.
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get label
possible with subset
idx | index of label to get |
在文件 DenseLabels.cpp 第 184 行定义.
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在文件 SGObject.cpp 第 1099 行定义.
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Returns description of a given parameter string, if it exists. SG_ERROR otherwise
param_name | name of the parameter |
在文件 SGObject.cpp 第 1123 行定义.
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Returns index of model selection parameter with provided index
param_name | name of model selection parameter |
在文件 SGObject.cpp 第 1136 行定义.
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get number of labels, depending on whether a subset is set
实现了 CLabels.
在文件 DenseLabels.cpp 第 201 行定义.
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get confidence value for a particular label
idx | label index |
在文件 Labels.cpp 第 55 行定义.
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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 |
在文件 SGObject.cpp 第 267 行定义.
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virtualinherited |
load labels from file
any subset is removed before
loader | File object via which to load data |
在文件 DenseLabels.cpp 第 145 行定义.
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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)
file_version | parameter version of the file |
current_version | version from which mapping begins (you want to use Version::get_version_parameter() for this in most cases) |
file | file to load from |
prefix | prefix for members |
在文件 SGObject.cpp 第 672 行定义.
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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
param_info | information of parameter |
file_version | parameter version of the file, must be <= provided parameter version |
file | file to load from |
prefix | prefix for members |
在文件 SGObject.cpp 第 513 行定义.
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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 |
param_version | (optional) a parameter version different to (this is mainly for testing, better do not use) |
在文件 SGObject.cpp 第 344 行定义.
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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 occurres. |
被 CWeightedDegreePositionStringKernel, CKernel, CList, CAlphabet, CLinearHMM, CGaussianKernel, CInverseMultiQuadricKernel, CCircularKernel , 以及 CExponentialKernel 重载.
在文件 SGObject.cpp 第 1028 行定义.
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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 occurres. |
被 CDynamicArray< T >, CDynamicArray< float64_t >, CDynamicArray< float32_t >, CDynamicArray< int32_t >, CDynamicArray< char >, CDynamicArray< bool > , 以及 CDynamicObjectArray 重载.
在文件 SGObject.cpp 第 1023 行定义.
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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
param_base | set of TParameter instances that are mapped to the provided target parameter infos |
base_version | version of the parameter base |
target_param_infos | set of SGParamInfo instances that specify the target parameter base |
在文件 SGObject.cpp 第 710 行定义.
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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
param_base | set of TParameter instances to use for migration |
target | parameter info for the resulting TParameter |
在文件 SGObject.cpp 第 917 行定义.
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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)
param_base | set of TParameter instances to use for migration |
target | parameter info for the resulting TParameter |
replacement | (used as output) here the TParameter instance which is returned by migration is created into |
to_migrate | the only source that is used for migration |
old_name | with this parameter, a name change may be specified |
在文件 SGObject.cpp 第 857 行定义.
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prints all parameter registered for model selection and their type
在文件 SGObject.cpp 第 1075 行定义.
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removes all subsets Calls subset_changed_post() afterwards
在文件 Labels.cpp 第 50 行定义.
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removes that last added subset from subset stack, if existing Calls subset_changed_post() afterwards
在文件 Labels.cpp 第 45 行定义.
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save labels to file
not possible with subset
writer | File object via which to save data |
在文件 DenseLabels.cpp 第 152 行定义.
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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 |
param_version | (optional) a parameter version different to (this is mainly for testing, better do not use) |
在文件 SGObject.cpp 第 285 行定义.
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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 occurres. |
被 CKernel 重载.
在文件 SGObject.cpp 第 1038 行定义.
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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 occurres. |
被 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.cpp 第 1033 行定义.
Converts all scores to calibrated probabilities by fitting a sigmoid function using the method described in Lin, H., Lin, C., and Weng, R. (2007). A note on Platt's probabilistic outputs for support vector machines.
A sigmoid is fitted to the scores of the labels and then is used to compute porbabilities which are stored in the values vector. This is done via computing \(pf=x*a+b\) for a given score \(x\) and then computing \(\frac{\exp(-f)}{1+}exp(-f)}\) if \(f\geq 0\) and \(\frac{1}{(1+\exp(f)}\) otherwise, where \(a, bf\) are shape parameters of the sigmoid. These can be specified or learned automatically
Should only be used in conjunction with SVM.
a | parameter a of sigmoid, if a=b=0, both are learned |
b | parameter b of sigmoid, if a=b=0, both are learned |
在文件 BinaryLabels.cpp 第 91 行定义.
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在文件 SGObject.cpp 第 40 行定义.
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在文件 SGObject.cpp 第 45 行定义.
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在文件 SGObject.cpp 第 50 行定义.
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在文件 SGObject.cpp 第 55 行定义.
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在文件 SGObject.cpp 第 60 行定义.
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在文件 SGObject.cpp 第 65 行定义.
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在文件 SGObject.cpp 第 70 行定义.
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在文件 SGObject.cpp 第 75 行定义.
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在文件 SGObject.cpp 第 80 行定义.
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在文件 SGObject.cpp 第 85 行定义.
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在文件 SGObject.cpp 第 90 行定义.
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在文件 SGObject.cpp 第 95 行定义.
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在文件 SGObject.cpp 第 100 行定义.
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在文件 SGObject.cpp 第 105 行定义.
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在文件 SGObject.cpp 第 110 行定义.
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set generic type to T
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set INT label
possible with subset
idx | index of label to set |
label | INT value of label |
在文件 DenseLabels.cpp 第 172 行定义.
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set label
possible with subset
idx | index of label to set |
label | value of label |
在文件 DenseLabels.cpp 第 160 行定义.
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set all labels to a const value
possible with subset
c | const to set labels to |
在文件 DenseLabels.cpp 第 63 行定义.
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virtualinherited |
set the confidence value for a particular label
value | value to set |
idx | label index whose conf. value is to be changed |
在文件 Labels.cpp 第 62 行定义.
set confidence vector
values | to be set (should have zero length to disable values or length must match the number of labels) |
在文件 Labels.cpp 第 74 行定义.
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virtualinherited |
A shallow copy. All the SGObject instance variables will be simply assigned and SG_REF-ed.
被 CGaussianKernel 重载.
在文件 SGObject.h 第 150 行定义.
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unset generic type
this has to be called in classes specializing a template class
在文件 SGObject.cpp 第 274 行定义.
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Updates the hash of current parameter combination.
在文件 SGObject.cpp 第 226 行定义.
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io
在文件 SGObject.h 第 513 行定义.
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parameters wrt which we can compute gradients
在文件 SGObject.h 第 528 行定义.
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Hash of parameter values
在文件 SGObject.h 第 534 行定义.
the label vector
在文件 DenseLabels.h 第 208 行定义.
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model selection parameters
在文件 SGObject.h 第 525 行定义.
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map for different parameter versions
在文件 SGObject.h 第 531 行定义.
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parameters
在文件 SGObject.h 第 522 行定义.
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parallel
在文件 SGObject.h 第 516 行定义.
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label designates classify reject
在文件 DenseLabels.h 第 201 行定义.
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version
在文件 SGObject.h 第 519 行定义.