void AddNodes(FPTreeNode ancestor, Queue <FPItem> record, FPNodeHeadTable nodeTable)
{
int size = record.Count;
if (size > 0)
{
FPItem item = record.Dequeue();
FPTreeNode node = item.CreateNode();
node.mCount = 1;
node.mParent = ancestor;
ancestor.AddChild(node);
int count = nodeTable.Size();
FPTreeNode tempNode = null;
for (int j = 0; j < count; ++j)
{
tempNode = nodeTable.At(j);
if (tempNode.mName == node.mName)
{
node.NextNode = tempNode.NextNode;
tempNode.NextNode = node;
//while (tempNode.NextNode != null)
//{
// tempNode = tempNode.NextNode;
//}
//tempNode.NextNode = node;
break;
}
}
AddNodes(node, record, nodeTable);
}
}
int CalcuelateSharedCount(FPTreeNode nodeA, FPTreeNode nodeB, FPTreeNode nodeC)
{
int count = 0;
FPTreeNode next = nodeC.NextNode;
FPTreeNode parent = null;
bool flagB = false;
bool flagA = false;
while (next != null)
{
parent = next.mParent;
while (parent != null)
{
if (!flagB && parent.mName == nodeB.mName)
{
flagB = true;
}
else if (flagB && !flagA && parent.mName == nodeA.mName)
{
flagA = true;
}
else if (flagB && flagA)
{
count += next.mCount;
break;
}
parent = parent.mParent;
}
flagB = false;
flagA = false;
next = next.NextNode;
}
return(count);
}
public FPTreeNode(string name, FPItem item)
{
mName = name;
mOwner = item;
mParent = null;
mSameNameNextNode = null;
mCount = 0;
mChildren = new List <FPTreeNode>();
}
void GenerateProbOne(FPTreeNode root, FPNodeHeadTable table, ref int total)
{
int size = table.Size();
for (int i = 0; i < size; ++i)
{
FPTreeNode child = table.At(i);
mProbs.Add(child.mName, child.mOwner.mSupport * 1.0f / total);
mExistCount.Add(child.mName, child.mOwner.mSupport);
}
}
void GenerateProbTwo(FPTreeNode root, FPNodeHeadTable table, ref int total)
{
int size = table.Size();
if (size <= 2)
{
return;
}
FPTreeNode childI = null;
List <List <FPTreeNode> > calculate = new List <List <FPTreeNode> >();
for (int i = 0; i < size - 1; ++i)
{
childI = table.At(i);
FPTreeNode childJ = null;
for (int j = i + 1; j < size; ++j)
{
List <FPTreeNode> temp = new List <FPTreeNode>();
childJ = table.At(j);
temp.Add(childI);
temp.Add(childJ);
calculate.Add(temp);
}
}
size = calculate.Count;
for (int i = 0; i < size; ++i)
{
FPTreeNode nodeA = calculate[i][0];
FPTreeNode nodeB = calculate[i][1];
int shareCount = CalcuelateSharedCount(nodeA, nodeB);
if (shareCount == 0)
{
continue;
}
float AB = shareCount * 1.0f / mExistCount[nodeA.mName];
float BA = shareCount * 1.0f / mExistCount[nodeB.mName];
mProbs.Add(nodeA.mName + " " + nodeB.mName, AB);
mProbs.Add(nodeB.mName + " " + nodeA.mName, BA);
mExistCount.Add(nodeA.mName + " " + nodeB.mName, shareCount);
}
}
private FPTreeNode BuildFPTree(FPTransitions transitions, FPNodeHeadTable table)
{
FPTreeNode root = new FPTreeNode("", null);
int size = transitions.Size();
for (int i = 0; i < size; ++i)
{
Queue <FPItem> record = new Queue <FPItem>();
SortByTable(transitions[i], table, ref record);
FPTreeNode subTreeRoot = root;
FPTreeNode tmpRoot = null;
while (record.Count > 0 && ((tmpRoot = subTreeRoot.FindChild(record.Peek().mName)) != null))
{
tmpRoot.Increasement(1);
subTreeRoot = tmpRoot;
record.Dequeue();
}
AddNodes(subTreeRoot, record, table);
}
return(root);
}
public void GrowthProb(FPTransitions transitions)
{
SetMinSupport(mMinSupport, transitions.Size());
FPNodeHeadTable table = BuildHeaderTable(transitions);
FPTreeNode root = BuildFPTree(transitions, table);
if (transitions.mDepth > mMaxDepth)
{
return;
}
int total = transitions.Size();
int size = table.Size();
if (size == 0)
{
return;
}
GenerateProbOne(root, table, ref total);
GenerateProbTwo(root, table, ref total);
GenerateProbThree(root, table, ref total);
}
int CalcuelateSharedCount(FPTreeNode nodeA, FPTreeNode nodeB)
{
int count = 0;
FPTreeNode next = nodeB.NextNode;
FPTreeNode parent = null;
while (next != null)
{
parent = next.mParent;
while (parent != null)
{
if (parent.mName == nodeA.mName)
{
count += next.mCount;
break;
}
parent = parent.mParent;
}
next = next.NextNode;
}
return(count);
}
void GenerateProbThree(FPTreeNode root, FPNodeHeadTable table, ref int total)
{
int size = table.Size();
if (size <= 3)
{
return;
}
FPTreeNode childI = null;
FPTreeNode childJ = null;
FPTreeNode childK = null;
List <List <FPTreeNode> > calculate = new List <List <FPTreeNode> >();
for (int i = 0; i < size - 2; ++i)
{
childI = table.At(i);
for (int j = i + 1; j < size - 1; ++j)
{
childJ = table.At(j);
for (int k = j + 1; k < size; ++k)
{
childK = table.At(k);
List <FPTreeNode> temp = new List <FPTreeNode>();
temp.Add(childI);
temp.Add(childJ);
temp.Add(childK);
calculate.Add(temp);
}
}
}
size = calculate.Count;
for (int i = 0; i < size; ++i)
{
FPTreeNode nodeA = calculate[i][0];
FPTreeNode nodeB = calculate[i][1];
FPTreeNode nodeC = calculate[i][2];
int shareCount = CalcuelateSharedCount(nodeA, nodeB, nodeC);
if (shareCount == 0)
{
continue;
}
string ABC = nodeA.mName + " " + nodeB.mName;
string ACB = nodeA.mName + " " + nodeC.mName;
string BCA = nodeB.mName + " " + nodeC.mName;
string BAC = nodeB.mName + " " + nodeA.mName;
string CAB = nodeC.mName + " " + nodeA.mName;
string CBA = nodeC.mName + " " + nodeB.mName;
float abc = shareCount * 1.0f / mExistCount[ABC];
float acb = shareCount * 1.0f / mExistCount[ACB];
float bca = shareCount * 1.0f / mExistCount[BCA];
float bac = shareCount * 1.0f / mExistCount[ABC];
float cab = shareCount * 1.0f / mExistCount[ACB];
float cba = shareCount * 1.0f / mExistCount[BCA];
mProbs.Add(ABC + " " + nodeC.mName, abc);
mProbs.Add(ACB + " " + nodeB.mName, acb);
mProbs.Add(BCA + " " + nodeA.mName, bca);
mProbs.Add(BAC + " " + nodeC.mName, bac);
mProbs.Add(CAB + " " + nodeB.mName, cab);
mProbs.Add(CBA + " " + nodeA.mName, cba);
mExistCount.Add(ABC + " " + nodeC.mName, shareCount);
}
}
public void Growth(FPTransitions transitions, List <string> postPatterns)
{
SetMinSupport(mMinSupport, transitions.Size());
FPNodeHeadTable table = BuildHeaderTable(transitions);
if (transitions.Depth > mMaxDepth)
{
return;
}
int size = table.Size();
if (size == 0)
{
return;
}
string post = "";
if (postPatterns != null)
{
int num = postPatterns.Count;
for (int n = num - 1; n >= 0; --n)
{
post += postPatterns[n] + " ";
}
post.Trim();
}
for (int i = 0; i < size; ++i)
{
FPTreeNode child = table.mHeaderNode[i];
FPTreeNode next = child.NextNode;
FPTransitions newTransitions = null;
List <string> samples = new List <string>();
while (next != null)
{
string str = "";
FPTreeNode parent = next.mParent;
while (parent != null)
{
str += parent.mName;
str += " ";
parent = parent.mParent;
}
str.Trim();
if (str == "")
{
next = next.NextNode;
continue;
}
if (transitions.Depth <= mMaxDepth)
{
for (int j = 0; j < next.mCount; ++j)
{
samples.Add(str);
}
}
if (post == "")
{
Debug.Log(str);
}
else
{
Debug.Log(str + " : " + post);
}
next = next.NextNode;
}
if (transitions.Depth <= mMaxDepth)
{
newTransitions = FPGrowth.ParseFromArray(samples, transitions.mDuplicate);
List <string> newPostPattern = new List <string>();
int num = postPatterns.Count;
for (int n = 0; n < num; ++n)
{
newPostPattern.Add(postPatterns[n]);
}
newPostPattern.Add(child.mName);
if (newTransitions != null)
{
newTransitions.Depth = transitions.Depth + 1;
Growth(newTransitions, newPostPattern);
}
}
}
}
public void AddTableNode(FPTreeNode node)
{
mHeaderNode.Add(node);
}
public void AddChild(FPTreeNode node)
{
mChildren.Add(node);
}
