CLogPlusOne Class Reference

Detailed Description

Preprocessor LogPlusOne does what the name says, it adds one to a dense real valued vector and takes the logarithm of each component of it.

It therefore does not need any initialization. It is most useful in situations where the inputs are counts: When one compares differences of small counts any difference may matter a lot, while small differences in large counts don't. This is what this log transformation controls for.

Definition at line 33 of file LogPlusOne.h.

Inheritance diagram for CLogPlusOne:

Public Member Functions
	CLogPlusOne ()
virtual	~CLogPlusOne ()
virtual bool	init (CFeatures *features)
	initialize preprocessor from features More...
virtual void	cleanup ()
	cleanup More...
virtual bool	load (FILE *f)
	initialize preprocessor from file More...
virtual bool	save (FILE *f)
	save preprocessor init-data to file More...
virtual SGMatrix< float64_t >	apply_to_feature_matrix (CFeatures *features)
virtual SGVector< float64_t >	apply_to_feature_vector (SGVector< float64_t > vector)
virtual const char *	get_name () const
virtual EPreprocessorType	get_type () const
	return a type of preprocessor More...
Public Member Functions inherited from CSimplePreprocessor< float64_t >
	CSimplePreprocessor ()
virtual EFeatureClass	get_feature_class ()
	return that we are simple features (just fixed size matrices) More...
virtual EFeatureType	get_feature_type ()
	return feature type More...
Public Member Functions inherited from CPreprocessor
	CPreprocessor ()
virtual	~CPreprocessor ()
Public Member Functions inherited from CSGObject
	CSGObject ()
	CSGObject (const CSGObject &orig)
virtual	~CSGObject ()
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="")
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 ()
SGVector< char * >	get_modelsel_names ()
char *	get_modsel_param_descr (const char *param_name)
index_t	get_modsel_param_index (const char *param_name)
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 ()

Additional Inherited Members
Public Attributes inherited from CSGObject
SGIO *	io
Parallel *	parallel
Version *	version
Parameter *	m_parameters
Parameter *	m_model_selection_parameters
Protected Member Functions inherited from CSGObject
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)

Constructor & Destructor Documentation

CLogPlusOne

(

)

default constructor

Definition at line 19 of file LogPlusOne.cpp.

~CLogPlusOne ( )

virtual

destructor

Definition at line 25 of file LogPlusOne.cpp.

Member Function Documentation

SGMatrix< float64_t > apply_to_feature_matrix ( CFeatures *  features )

virtual

apply preproc on feature matrix result in feature matrix return pointer to feature_matrix, i.e. f->get_feature_matrix();

Implements CSimplePreprocessor< float64_t >.

Definition at line 62 of file LogPlusOne.cpp.

SGVector< float64_t > apply_to_feature_vector ( SGVector< float64_t >  vector )

virtual

apply preproc on single feature vector result in feature matrix

Implements CSimplePreprocessor< float64_t >.

Definition at line 78 of file LogPlusOne.cpp.

void cleanup ( )

virtual

cleanup

clean up allocated memory

Implements CPreprocessor.

Definition at line 39 of file LogPlusOne.cpp.

virtual const char* get_name ( ) const

virtual

Returns

object name

Implements CSGObject.

Definition at line 62 of file LogPlusOne.h.

virtual EPreprocessorType get_type ( ) const

virtual

return a type of preprocessor

Reimplemented from CSimplePreprocessor< float64_t >.

Definition at line 65 of file LogPlusOne.h.

bool init ( CFeatures *  features )

virtual

initialize preprocessor from features

Implements CPreprocessor.

Definition at line 30 of file LogPlusOne.cpp.

bool load ( FILE *  f )

virtual

initialize preprocessor from file

Definition at line 44 of file LogPlusOne.cpp.

bool save ( FILE *  f )

virtual

save preprocessor init-data to file

Definition at line 52 of file LogPlusOne.cpp.

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

• LogPlusOne.h
• LogPlusOne.cpp