dai::Evidence Class Reference

Stores a data set consisting of multiple samples, where each sample is the observed joint state of some variables. More...

#include <dai/evidence.h>

Public Types
typedef std::map< Var, size_t >	Observation
	Stores joint state of a set of variables. More...

Public Member Functions
	Evidence ()
	Default constructor. More...
	Evidence (std::vector< Observation > &samples)
	Construct from samples. More...
void	addEvidenceTabFile (std::istream &is, FactorGraph &fg)
	Read in tabular data from a stream and add the read samples to *this. More...
size_t	nrSamples () const
	Returns number of stored samples. More...

Private Member Functions
void	addEvidenceTabFile (std::istream &is, std::map< std::string, Var > &varMap)
	Read in tabular data from a stream and add the read samples to *this. More...

Private Attributes
std::vector< Observation >	_samples
	Each sample is an observed joint state of some variables. More...

Iterator interface
typedef std::vector< Observation >::iterator	iterator
	Iterator over the samples. More...
typedef std::vector< Observation >::const_iterator	const_iterator
	Constant iterator over the samples. More...
iterator	begin ()
	Returns iterator that points to the first sample. More...
const_iterator	begin () const
	Returns constant iterator that points to the first sample. More...
iterator	end ()
	Returns iterator that points beyond the last sample. More...
const_iterator	end () const
	Returns constant iterator that points beyond the last sample. More...

Detailed Description

Stores a data set consisting of multiple samples, where each sample is the observed joint state of some variables.

Note

Each sample can describe the joint state of a different set of variables, in order to be able to deal with missing data.

Author

Charles Vaske

Examples:

example_sprinkler_em.cpp.

Member Typedef Documentation

typedef std::map<Var, size_t> dai::Evidence::Observation

Stores joint state of a set of variables.

typedef std::vector<Observation>::iterator dai::Evidence::iterator

Iterator over the samples.

typedef std::vector<Observation>::const_iterator dai::Evidence::const_iterator

Constant iterator over the samples.

Constructor & Destructor Documentation

dai::Evidence::Evidence ( )

inline

Default constructor.

dai::Evidence::Evidence ( std::vector< Observation > &  samples )

inline

Construct from samples.

Member Function Documentation

void dai::Evidence::addEvidenceTabFile	(	std::istream &	is,
		FactorGraph &	fg
	)

Read in tabular data from a stream and add the read samples to *this.

Parameters

is	Input stream in .tab file format, describing joint observations of variables in fg
fg	Factor graph describing the corresponding variables

See also

Evidence (.tab) file format

Exceptions

INVALID_EVIDENCE_FILE

if the input stream is not valid

Examples:

example_sprinkler_em.cpp.

size_t dai::Evidence::nrSamples ( ) const

inline

Returns number of stored samples.

Examples:

example_sprinkler_em.cpp.

iterator dai::Evidence::begin ( )

inline

Returns iterator that points to the first sample.

const_iterator dai::Evidence::begin ( ) const

inline

Returns constant iterator that points to the first sample.

iterator dai::Evidence::end ( )

inline

Returns iterator that points beyond the last sample.

const_iterator dai::Evidence::end ( ) const

inline

Returns constant iterator that points beyond the last sample.

void dai::Evidence::addEvidenceTabFile ( std::istream &  is, std::map< std::string, Var > &  varMap  )

private

Read in tabular data from a stream and add the read samples to *this.

Member Data Documentation

std::vector<Observation> dai::Evidence::_samples

private

Each sample is an observed joint state of some variables.

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

• include/dai/evidence.h
• src/evidence.cpp