protected override Itemset[] ScanDbAndCountCandidatesSupport(Itemset[] candidates)
{
foreach (var transaction in _db.Transactions)
{
if (IsReducted(transaction))
{
continue;
}
bool containsCandidates = false;
foreach (var candidate in candidates)
{
if (ItemsetHelper.IsSubset(transaction.Items, candidate.Items))
{
candidate.Support++;
containsCandidates = true;
}
}
if (containsCandidates)
{
continue;
}
ReduceTransaction(transaction);
}
return(candidates);
}
private void CountSupportForCandidatesInRange(Tuple <int, int> range)
{
for (int i = range.Item1; i < range.Item2; i++)
{
if (ItemsetHelper.IsSubset(_actualTransaction.Items, _candidates[i].Items))
{
_candidates[i].Support++;
}
}
}
protected virtual Itemset[] ScanDbAndCountCandidatesSupport(Itemset[] candidates)
{
foreach (var transaction in _db.Transactions)
{
foreach (var candidate in candidates)
{
if (ItemsetHelper.IsSubset(transaction.Items, candidate.Items))
{
candidate.Support++;
}
}
}
return(candidates);
}
public void Can_Calculate_SubItemset()
{
bool result = ItemsetHelper.IsSubset(Itemset.Create(1), Itemset.Create(2));
Assert.AreEqual(false, result);
result = ItemsetHelper.IsSubset(Itemset.Create(1, 2), Itemset.Create(2));
Assert.AreEqual(true, result);
result = ItemsetHelper.IsSubset(Itemset.Create(1, 2, 3), Itemset.Create(2));
Assert.AreEqual(true, result);
result = ItemsetHelper.IsSubset(Itemset.Create(1, 2, 3), Itemset.Create(2, 3));
Assert.AreEqual(true, result);
result = ItemsetHelper.IsSubset(Itemset.Create(1, 2, 3), Itemset.Create(2, 3, 4));
Assert.AreEqual(false, result);
}