techniques.BN
Class ProbTable

java.lang.Object
  |
  +--techniques.BN.ProbTable

public class ProbTable

extends Object

Represents a probability table, and can be thought of as a maintainer of functions of discrete types.

Field Summary

double[]

table

Constructor Summary

ProbTable(Variable var)

ProbTable(Variable[] var)

Method Summary

String	getCompleteString() Returns string of variables and data in table
int	getNumVariables()
double	getProb(int[] evidence) Same as getProb(Map) with evidence instead provided as an int array.
double	getProb(Map evidence) Used to get the probability values for the given variable evidence.
String	getTableAsString()
int	getTableSize() Returns size of the underlying table.
static int	getTableSize(Variable[] var) Returns size of the table that would be formed from the given variables
Variable	getVariable(int i)
Variable[]	getVariables()
Iterator	getVariablesIterator() Returns an iterator through a set of all entries (variable-value combinations for the variables) in the table.
String	getVarString() Returns string of variables in table
void	setProb(int[] evidence, double prob)
void	setProb(Map evidence, double prob) All values for variables in the table are needed to be in the map for successful completion of the method
void	setTableValue(HashMap knownValues, double inTableValue) Sets the probability table value given all the values for the parents of the current prob.
void	setTableValue(int[] evidence, double inTableValue) Sets the probability table value given all the values for the parents of the current prob.
void	setTableValues(HashMap knownValues, double[] inTableValues) Sets the probability tables values given the first few variable values for the current prob.
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

table

public double[] table

Constructor Detail

ProbTable

public ProbTable(Variable var)

ProbTable

public ProbTable(Variable[] var)

Method Detail

getTableSize

public int getTableSize()

Returns size of the underlying table.

getTableSize

public static int getTableSize(Variable[] var)

Returns size of the table that would be formed from the given variables

setTableValue

public void setTableValue(HashMap knownValues,
                          double inTableValue)

Sets the probability table value given all the values for the parents of the current prob. table. This method is identical to setProb

setTableValue

public void setTableValue(int[] evidence,
                          double inTableValue)

Sets the probability table value given all the values for the parents of the current prob. table.

setTableValues

public void setTableValues(HashMap knownValues,
                           double[] inTableValues)

Sets the probability tables values given the first few variable values for the current prob. table.

getProb

public double getProb(Map evidence)

Used to get the probability values for the given variable evidence. All values (as given by indices) in the table (for the variable and parents), need to be specified in the evidence (otherwise a not enough evidence exception will be thrown).

setProb

public void setProb(Map evidence,
                    double prob)

All values for variables in the table are needed to be in the map for successful completion of the method

getProb

public double getProb(int[] evidence)

Same as getProb(Map) with evidence instead provided as an int array.

Parameters:

evidence - - evidence in the same order as the variables

setProb

public void setProb(int[] evidence,
                    double prob)

Parameters:

evidence - - evidence in the same order as the variables

getVariables

public Variable[] getVariables()

getVariable

public Variable getVariable(int i)

getNumVariables

public int getNumVariables()

getVarString

public String getVarString()

Returns string of variables in table

toString

public String toString()

Overrides:

toString in class Object

getTableAsString

public String getTableAsString()

getCompleteString

public String getCompleteString()

Returns string of variables and data in table

getVariablesIterator

public Iterator getVariablesIterator()

Returns an iterator through a set of all entries (variable-value combinations for the variables) in the table. The entries are represented by maps of the variables to their values (actually indexes of the values).