/// <summary>
/// ������е�ģʽ
/// ��ȡ�Ӽ��㷨
/// </summary>
/// <param name="_treeNodeItemList"></param>
public void CombineNodes(FPTree _fpTree, List<ItemSet> _itemSetList)
{
//��ȡ���н��
List<TreeNodeItem> _treeNodeItemList = new List<TreeNodeItem>();
TreeNodeItem _treeNodeItem = _fpTree.TopNode;
bool _hasNext = (_treeNodeItem.Nodes.Count > 0);
_treeNodeItem = _treeNodeItem.Nodes[0];
while (_hasNext)
{
_treeNodeItemList.Add(_treeNodeItem);
if (_treeNodeItem.Nodes.Count > 0)
_treeNodeItem = _treeNodeItem.Nodes[0];
else
_hasNext = false;
}
int _length = _treeNodeItemList.Count;
//��1��ʼ,��Ϊ��ȡ�ռ�
for (int i = 1; i < Math.Pow(2, _length); i++)
{
String str = Convert.ToString(int.Parse(i.ToString()), 2);
str = str.PadLeft(_length, '0');
char[] _arrChr = str.ToCharArray();
ItemSet _itemSet = new ItemSet();
for (int j = _arrChr.Length-1; j >-1; j--)
{
if (_arrChr[j] == '1')
{
_itemSet.Content.Add(_treeNodeItemList[j].ItemName);
if (_itemSet.Count == 0)
_itemSet.Count = _treeNodeItemList[j].Count;
else
{
//֧�ֶȵ��ڦ��н����С��֧�ֶȼ���
if(_treeNodeItemList[j].Count < _itemSet.Count)
_itemSet.Count = _treeNodeItemList[j].Count;
}
}
}
if(_itemSet.Content.Count!=0)
_itemSetList.Add(_itemSet);
}
}
/// <summary>
/// ��Ϊ��ʱ����ģʽ
/// </summary>
/// <param name="_itemSetConbine">����Ħ� = a(i)�Ȧ�</param>
private void AddPattern(List<TreeNodeItem> _itemSetConbine,FPTree _fpTree)
{
//����ģʽ
if (!_frequentPattern.ContainsKey(_itemSetConbine.Count))
{
List<ItemSet> _tmpItemSetList = new List<ItemSet>();
ItemSet _tmpItemSet = new ItemSet();
//����ģʽ
foreach (TreeNodeItem _nodes in _itemSetConbine)
{
_tmpItemSet.Content.Add(_nodes.ItemName);
}
_tmpItemSet.Count =
_fpTree.GetSupCountByID(
_itemSetConbine[0].ItemName);
_tmpItemSetList.Add(_tmpItemSet);
_frequentPattern.Add(_itemSetConbine.Count, _tmpItemSetList);
}
else
{
List<ItemSet> _tmpItemSetList = (List<ItemSet>)_frequentPattern[_itemSetConbine.Count];
ItemSet _tmpItemSet = new ItemSet();
//����/���������
foreach (TreeNodeItem _nodes in _itemSetConbine)
{
_tmpItemSet.Content.Add(_nodes.ItemName);
}
_tmpItemSet.Count =
_fpTree.GetSupCountByID(
_itemSetConbine[0].ItemName);
_tmpItemSetList.Add(_tmpItemSet);
//_frequentPattern[_itemSetConbine.Count] = _tmpItemSetList;
}
}
