semantics::Context_cell_base Class Reference

#include <Cell_base_classes.h>

Inheritance diagram for semantics::Context_cell_base:

Public Types
typedef boost::shared_ptr < Context_cell_base >	Self_ptr
Public Types inherited from semantics::Cell
typedef boost::shared_ptr< Cell >	Self_ptr
typedef std::vector< size_t >	Step_sizes

Public Member Functions
int	diversity () const
	get number of distinct outcomes in this context More...
double	alpha () const
	get the Dirichlet Process concentration parameter for this context More...
virtual void	increment_diversity ()
	increment the number of distinct outcomes from this context More...
virtual void	decrement_diversity ()
	decrement the number of distinct outcomes from this context More...
void	resample_alpha ()
	resample alpha value from conditional posterior More...
double	effective_tables () const
	total mass for distribution over the "dish" for a new table More...
double	effective_observations () const
	total mass for distribution over dish for a new customer More...
double	table_backoff_weight () const
	probability that a new table will draw from the level above this More...
double	observation_backoff_weight () const
	probability that a new customer will sit at a new table More...
Public Member Functions inherited from semantics::Cell
const size_t &	count () const
	get current count in this cell More...
const size_t &	table_count () const
	get number of "tables" in this cell More...
virtual const Categorical_event_base &	key () const =0
	return variable values in this cell More...
virtual void	increment ()
	increment count More...
virtual void	decrement ()
	decrement count More...
virtual void	increment_table_count ()
	increment table count More...
virtual void	decrement_table_count ()
	decrement table count More...

Static Public Member Functions
static const double &	a ()
static const double &	b ()

Protected Member Functions
	Context_cell_base ()
	constructor More...
Protected Member Functions inherited from semantics::Cell
	Cell ()
	default ctor More...
virtual	~Cell ()
	virtual destructor More...

Additional Inherited Members
Static Public Attributes inherited from semantics::Cell
static bool	VERBOSE = false
Protected Attributes inherited from semantics::Cell
size_t	count_
size_t	table_count_

Member Typedef Documentation

typedef boost::shared_ptr<Context_cell_base> semantics::Context_cell_base::Self_ptr

Constructor & Destructor Documentation

semantics::Context_cell_base::Context_cell_base ( )

inlineprotected

constructor

Member Function Documentation

const double & semantics::Context_cell_base::a ( )

static

double semantics::Context_cell_base::alpha ( ) const

inline

get the Dirichlet Process concentration parameter for this context

const double & semantics::Context_cell_base::b ( )

static

virtual void semantics::Context_cell_base::decrement_diversity ( )

inlinevirtual

decrement the number of distinct outcomes from this context

int semantics::Context_cell_base::diversity ( ) const

inline

get number of distinct outcomes in this context

double semantics::Context_cell_base::effective_observations ( ) const

inline

total mass for distribution over dish for a new customer

corresponds to alpha + n(H)

double semantics::Context_cell_base::effective_tables ( ) const

inline

total mass for distribution over the "dish" for a new table

corresponds to alpha + m(H)

virtual void semantics::Context_cell_base::increment_diversity ( )

inlinevirtual

increment the number of distinct outcomes from this context

double semantics::Context_cell_base::observation_backoff_weight ( ) const

inline

probability that a new customer will sit at a new table

corresponds to mixture weight (alpha / (n + alpha))

void semantics::Context_cell_base::resample_alpha

(

)

resample alpha value from conditional posterior

double semantics::Context_cell_base::table_backoff_weight ( ) const

inline

probability that a new table will draw from the level above this

corresponds to mixture weight (alpha / (m + alpha))

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

• /work/kobus/src/lib/semantics/Cell_base_classes.h
• /work/kobus/src/lib/semantics/Cell_base_classes.cpp