public List <AssociationRule <T> > GenerateCandidateRules(List <ItemSet <IFact <T> > > frequentPatterns)
{
var candidateRules = new List <AssociationRule <T> >();
frequentPatterns.ForEach(x =>
{
var powerSet = PowerSetGenerator <T> .GeneratePowerSet(x);
candidateRules.AddRange(powerSet.Where(set => !set.IsEmpty() && set.Items.Count < x.Items.Count).Select(set =>
{
return(new AssociationRule <T>(set, x.Not(set)));
}));
});
return(candidateRules);
}
public List <AssociationRule <T> > GenerateCandidateRules(List <IFact <T> > targetFacts, List <ItemSet <IFact <T> > > frequentPatterns)
{
if (targetFacts == null)
{
return(GenerateCandidateRules(frequentPatterns));
}
var candidateRules = new List <AssociationRule <T> >();
frequentPatterns.ForEach(x =>
{
var powerSet = PowerSetGenerator <T> .GeneratePowerSet(x);
candidateRules.AddRange(powerSet.Where(set => !set.IsEmpty() && !candidateRules.Any(rule => rule.Left.Equals(set))).Select(set =>
{
var targetItemset = new ItemSet <IFact <T> >(targetFacts);
return(new AssociationRule <T>(set, targetItemset));
}));
});
return(candidateRules);
}
