class CBNSNetwork

This class is the public interface class that should be used by the programmer to create the network

Public Fields

static int

m_nCounter This variable is used to check for the memory leak in the program

Public Methods

void	PrintNodeProbabilities () Prints the node probabilities to the console
void	PrintProbability () Prints the functional form of the Joint probability distribution of the network to the console

Public

	Constructors and Destructor CBNSNetwork () Default Construtor CBNSNetwork (const CBNSNetwork& net) Copy Constructor CBNSNetwork (const string &xbn_network_file) Network created from a file ~CBNSNetwork () Destructor
	Out Functions int GetNumberOfNodes () Returns the number of nodes in the network int GetNumberOfLinks () Returns the number of links in the network string GetFileName () const Returns the name of the file from which the network is built CBNSNode* GetNode (int index) Returns a pointer to the node, this function should actually take the name of the node as a parameter instead of index CBNSSet <CBNSNode*> & GetNodes () Returns the Set of nodes in the network CBNSSet <CBNSLink*> & GetLinks () Returns the Set of links in the network
	Network from files void Load (const string &domain_file) Loads the network from the domain_file void Create () Creates the network ??? void Save (const string &file_name) Saves the network to a file
	Network Functions void Init () Initializes the network void Compile () Compiles the network void UnCompile () Uncompiles the network bool IsCompiled () Returns true if the network is compiled bool IsPropagated () Returns true if the network is propagated bool NeedsPropagation () Returns true if the network needs propagated bool IsLink (CBNSNode *pNode1, CBNSNode *pNode2) Returns true if a link exists between pNode1 and pNode2 bool IsSingleNetwork () Returns false if the network is a forest bool IsDAG () Returns true if the network is a Directed Acyclic Graph void Initialize () Initializes the network void AddNode (CBNSNode* pNode) Adds a node to the network void RemoveNode (CBNSNode* pNode) Removes a node from the network void AddLink (CBNSLink* link, bool bUpdateNodeTable = true) Adds a link to the network and updates the node tables connected to the link if bUpdateNodeTable is true void RemoveLink (CBNSLink* link, bool bUpdateNodeTable = true) Removes a link from the network and updates the node tables connected to the link if bUpdateNodeTable is true void UpdateTablesSize () Updates teh Table sizes of the nodes void SetEvidence (CBNSNode* pNode, int nStateIndex) Sets the Evidence for a Node to a particular state void Propagate (eBNSPropagationMethod method = PROPAGATION_DEFAULT) Propagates the Evidence
	Junction Tree Functions void CreateJunctionTree () Creates the Junction Tree void SetJunctionTree (CBNSJunctionTree &cJunctionTree) Sets the Junction Tree to cJunctionTree CBNSJunctionTree GetJunctionTree () Returns the Junction Tree
	Overloaded Operators CBNSNetwork& operator= (const CBNSNetwork& net) Assignment operator
	Friend Functions friend ostream& operator << (ostream& o, CBNSNetwork &nw) Stream insertion operator

Private

Private Member Variables bool m_bIsCompiled This variable is true if the network is compiled bool m_bInitialized This variable is true if the network is initialized bool m_bNeedsPropagation This variable is true if the network needs propagation CBNSJunctionTree m_cJunctionTree Junction Tree CBNSSet <CBNSNode*> m_cNodesSet Set of Nodes CBNSSet <CBNSLink*> m_cLinksSet Set of Links

static int m_nCounter

This variable is used to check for the memory leak in the program

Constructors and Destructor

CBNSNetwork()

Default Construtor

CBNSNetwork(const CBNSNetwork& net)

Copy Constructor

Parameters:

net - a reference to CBNSNetwork object

CBNSNetwork(const string &xbn_network_file)

Network created from a file

Parameters:

xbn_network_file - the name of the file

~CBNSNetwork()

Destructor

Out Functions

int GetNumberOfNodes()

Returns the number of nodes in the network

Returns:

int

int GetNumberOfLinks()

Returns the number of links in the network

Returns:

int

string GetFileName() const

Returns the name of the file from which the network is built

Returns:

string

CBNSNode* GetNode(int index)

Returns a pointer to the node, this function should actually take the name of the node as a parameter instead of index

Returns:

CBNSNode*

Parameters:

index - index of the node

CBNSSet <CBNSNode*> & GetNodes()

Returns the Set of nodes in the network

Returns:

reference to CBNSSet

CBNSSet <CBNSLink*> & GetLinks()

Returns the Set of links in the network

Returns:

reference to CBNSSet

Network from files

void Load(const string &domain_file)

Loads the network from the domain_file

Parameters:

domain_file - name of the file

void Create()

Creates the network ???

void Save(const string &file_name)

Saves the network to a file

Parameters:

file_name - name of the file

Network Functions

void Init()

Initializes the network

void Compile()

Compiles the network

void UnCompile()

Uncompiles the network

bool IsCompiled()

Returns true if the network is compiled

Returns:

bool

bool IsPropagated()

Returns true if the network is propagated

Returns:

bool

bool NeedsPropagation()

Returns true if the network needs propagated

Returns:

bool

bool IsLink(CBNSNode *pNode1, CBNSNode *pNode2)

Returns true if a link exists between pNode1 and pNode2

Returns:

bool

Parameters:

pNode1 - a pointer to CBNSNode
pNode2 - a pointer to CBNSNode

bool IsSingleNetwork()

Returns false if the network is a forest

Returns:

bool

bool IsDAG()

Returns true if the network is a Directed Acyclic Graph

Returns:

bool

void Initialize()

Initializes the network

void AddNode(CBNSNode* pNode)

Adds a node to the network

Parameters:

pNode - a pointer to CBNSNode object

void RemoveNode(CBNSNode* pNode)

Removes a node from the network

Parameters:

pNode - a pointer to CBNSNode object

void AddLink(CBNSLink* link, bool bUpdateNodeTable = true)

Adds a link to the network and updates the node tables connected to the link if bUpdateNodeTable is true

Parameters:

pLink - a pointer to CBNSLink object
bUpdateNodeTable - updates the table of the child node of the link

void RemoveLink(CBNSLink* link, bool bUpdateNodeTable = true)

Removes a link from the network and updates the node tables connected to the link if bUpdateNodeTable is true

Parameters:

pLink - a pointer to CBNSLink object
bUpdateNodeTable - updates the table of the child node of the link

void UpdateTablesSize()

Updates teh Table sizes of the nodes

void SetEvidence(CBNSNode* pNode, int nStateIndex)

Sets the Evidence for a Node to a particular state

Parameters:

pNode - a pointer to a node for which the evidence is set
nStateIndex - the probability of state nStateIndex is set to 1

void Propagate(eBNSPropagationMethod method = PROPAGATION_DEFAULT)

Propagates the Evidence

Parameters:

method - a default propagation scheme is used now, further implementation should include other propagation schemes

Junction Tree Functions

void CreateJunctionTree()

Creates the Junction Tree

void SetJunctionTree(CBNSJunctionTree &cJunctionTree)

Sets the Junction Tree to cJunctionTree

Parameters:

cJunctionTree - a reference to a CBNSJunctionTree object

CBNSJunctionTree GetJunctionTree()

Returns the Junction Tree

Returns:

CBNSJunctionTree

void PrintNodeProbabilities()

Prints the node probabilities to the console

void PrintProbability()

Prints the functional form of the Joint probability distribution of the network to the console

Overloaded Operators

CBNSNetwork& operator=(const CBNSNetwork& net)

Assignment operator

Parameters:

net - a reference to CBNSNetwork object

Friend Functions

friend ostream& operator << (ostream& o, CBNSNetwork &nw)

Stream insertion operator

Parameters:

o - reference to ostream object
nw - reference to CBNSNetwork object

Private Member Variables

bool m_bIsCompiled

This variable is true if the network is compiled

bool m_bInitialized

This variable is true if the network is initialized

bool m_bNeedsPropagation

This variable is true if the network needs propagation

CBNSJunctionTree m_cJunctionTree

Junction Tree

CBNSSet <CBNSNode*> m_cNodesSet

Set of Nodes

CBNSSet <CBNSLink*> m_cLinksSet

Set of Links

This class has no child classes.

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(c)opyright by Malte Zöckler, Roland Wunderling
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