public void TestCtwContextTreeNode()
{
var tree = new CTWContextTree(5);
var n = new CTWContextTreeNode(tree);
Assert.AreEqual(0.0, n.LogKt, 0.001);
Assert.AreEqual(0.0, n.LogProbability, 0.001);
Assert.AreEqual(0, n.SymbolCount(0));
Assert.AreEqual(0, n.SymbolCount(1));
Assert.AreEqual(0, n.NumberOf0S);
Assert.AreEqual(0, n.NumberOf1S);
Assert.AreEqual(tree, n.Tree);
Assert.AreEqual(0, n.Visits());
Assert.AreEqual(true, n.IsLeaf());
Assert.AreEqual(1, n.Size());
n.Update(1);
n.Update(0);
n.Update(0);
n.Update(0);
n.Update(1);
Assert.AreEqual(-4.4465, n.LogKt, 0.001);
Assert.AreEqual(-4.44656, n.LogProbability, 0.001);
Assert.AreEqual(3, n.SymbolCount(0));
Assert.AreEqual(2, n.SymbolCount(1));
Assert.AreEqual(3, n.NumberOf0S);
Assert.AreEqual(2, n.NumberOf1S);
Assert.AreEqual(tree, n.Tree);
Assert.AreEqual(5, n.Visits());
Assert.AreEqual(true, n.IsLeaf());
Assert.AreEqual(1, n.Size());
n.Revert(1);
Assert.AreEqual(-3.2425, n.LogKt, 0.001);
Assert.AreEqual(-3.24259, n.LogProbability, 0.001);
Assert.AreEqual(3, n.SymbolCount(0));
Assert.AreEqual(1, n.SymbolCount(1));
Assert.AreEqual(3, n.NumberOf0S);
Assert.AreEqual(1, n.NumberOf1S);
Assert.AreEqual(tree, n.Tree);
Assert.AreEqual(4, n.Visits());
Assert.AreEqual(true, n.IsLeaf());
Assert.AreEqual(1, n.Size());
//Todo:test non-leaf
}
public void revert_tree(int symbolCount = 1)
{
for (int i = 0; i < symbolCount; i++)
{
if (this.History.Count == 0)
{
return;
}
int symbol = this.History.Last();
this.History.RemoveAt(this.History.Count - 1);
if (this.History.Count >= this.Depth)
{
this.update_context();
for (int j = this.Depth - 1; j >= 0; j--)
{
CTWContextTreeNode node = this.Context[j];
node.Revert(symbol);
}
}
}
}
