edu::tum::cs::srl::bayesnets::learning::CPTLearner Class Reference

Inheritance diagram for edu::tum::cs::srl::bayesnets::learning::CPTLearner:

Public Member Functions
	CPTLearner (RelationalBeliefNetwork bn, boolean uniformDefault, boolean debug) throws Exception
	CPTLearner (RelationalBeliefNetwork bn) throws Exception
void	learn (Database db) throws Exception
void	learnTyped (Database db, boolean closedWorld, boolean verbose) throws Exception
Protected Member Functions
void	countVariable (Database db, RelationalNode node, String[] params, String[] domainNames, int i, boolean closedWorld) throws Exception
void	countVariable (Database db, RelationalNode node, String[] params, boolean closedWorld) throws Exception
Protected Attributes
boolean	debug = false
HashMap< Integer, HashMap < String, Integer > >	marginals
int	numExamples
boolean	verbose

Detailed Description

Definition at line 21 of file srl/bayesnets/learning/CPTLearner.java.

Constructor & Destructor Documentation

edu::tum::cs::srl::bayesnets::learning::CPTLearner::CPTLearner ( RelationalBeliefNetwork bn ) throws Exception [inline]

Definition at line 28 of file srl/bayesnets/learning/CPTLearner.java.

edu::tum::cs::srl::bayesnets::learning::CPTLearner::CPTLearner	(	RelationalBeliefNetwork	bn,
		boolean	uniformDefault,
		boolean	debug
	)			throws Exception `[inline]`

Definition at line 32 of file srl/bayesnets/learning/CPTLearner.java.

Member Function Documentation

void edu::tum::cs::srl::bayesnets::learning::CPTLearner::countVariable	(	Database	db,
		RelationalNode	node,
		String[]	params,
		String[]	domainNames,
		int	i,
		boolean	closedWorld
	)			throws Exception `[inline, protected]`

generates all groundings (possible lists of parameters) of the node with the given name and counts the corresponding example

Parameters:

	db	the database (containing domains and propositions) to use
	nodeName	name of the node for which to count examples
	params	current list of parameters
	domainNames	list of domain names, with one entry for each parameter
	i	index into params at which to insert the next parameter
	closedWorld	whether to make the closed-world assumption

Exceptions:

Exception

Definition at line 301 of file srl/bayesnets/learning/CPTLearner.java.

void edu::tum::cs::srl::bayesnets::learning::CPTLearner::countVariable	(	Database	db,
		RelationalNode	node,
		String[]	params,
		boolean	closedWorld
	)			throws Exception `[inline, protected]`

count an example (variable setting) by incrementing the counter for the given variable

Parameters:

	db	the database containing propositions
	node	node of the variable for which we are counting an example
	params	the node's actual parameters
	closedWorld	whether the closed-world assumption is to be made

Exceptions:

Exception

Definition at line 47 of file srl/bayesnets/learning/CPTLearner.java.

void edu::tum::cs::srl::bayesnets::learning::CPTLearner::learn ( Database db ) throws Exception [inline]

learn the CPTs from only the data that is given in the database (relations not in the database are not considered because the closed-world assumption is not being made)

Parameters:

db

Exceptions:

Exception

Definition at line 249 of file srl/bayesnets/learning/CPTLearner.java.

void edu::tum::cs::srl::bayesnets::learning::CPTLearner::learnTyped	(	Database	db,
		boolean	closedWorld,
		boolean	verbose
	)			throws Exception `[inline]`

generates for all nodes all the possible parameters (using the node signatures and domain elements from the database) and counts the corresponding examples

Parameters: