cve
Class FactorUpdatable

java.lang.Object
  |
  +--ve.Factor
        |
        +--ve.FactorStored
              |
              +--cve.FactorUpdatable

public class FactorUpdatable

extends FactorStored

This the the class of factors that can be updated from generalised rules.

Inner classes inherited from class ve.FactorStored

FactorStored.Itr

Field Summary

private int[]

base gives the number of elements to the right for each variable.

Fields inherited from class ve.FactorStored

factorValues

Fields inherited from class ve.Factor

BY_ASSIGN, BY_CPT, BY_DETERMINISTIC, BY_EXPANDING, BY_GENRULE, BY_MAXIMIZING, BY_MULTIPLYING, BY_NORMALIZING, BY_OBSERVED, BY_PLUS, BY_REORDERING, BY_SAVEIT, BY_SUM_OUT, BY_UNIFORM, BY_UPDATABLE, BY_V_ELIM, howCreatedVal, savingForTracing, thesize, variables

Constructor Summary

(package private)

FactorUpdatable(Variable[] vars) constructs a factor with the given variables.

Method Summary

void	update(GenRule rule) updates every stored value corresponding to the rule.
private void	updatefrom(GenRule rule, int conpos, int facpos, int varpos, int valpos, EltsIterator ruleItr) when updating by a rule, updatefrom iterates over the variables in the current factor.

Methods inherited from class ve.FactorStored

iterator

Methods inherited from class ve.Factor

allOnes, contains, display, getName, getSavingForTracing, getVariables, howCreated, isRedundant, isRedundant, print, print, printVariables, setSavingForTracing, size, toString

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, wait, wait, wait

Field Detail

base

private int[] base

gives the number of elements to the right for each variable.

Constructor Detail

FactorUpdatable

FactorUpdatable(Variable[] vars)

constructs a factor with the given variables.

Parameters:

vars - the list of variables

Method Detail

update

public void update(GenRule rule)

updates every stored value corresponding to the rule. This must also update all of the values.

updatefrom

private void updatefrom(GenRule rule,
                        int conpos,
                        int facpos,
                        int varpos,
                        int valpos,
                        EltsIterator ruleItr)

when updating by a rule, updatefrom iterates over the variables in the current factor. For each variable it does different things depending on whether the variable is in the context, in the factor of the rule or isn't in the generalised rule.

Parameters:

rule - the rule to be updating from

conpos - the current position in the context of the rule

facpos - the current position in the variables of the rule

varpos - the current position in the varibales of the current factor

valpos - the current position in the values of the current factor

ruleItr - an iterator over the rule factor

Returns:

the updated position in the current factor