Hi, Kei& Oura
I tested -q option with value 0 and 1, but it didn't work. Let me discribe my purpose and may you check if my procedure is correct please.
My request:
In my question set, there is a question that i always wanted to set as the root node question for the tree of every state of every feature. I call it the "root-node question". My expected tree is like this:
========this is the expected tree-mgc.inf for example========
QS ROOT_QUEST { "*+x#*" }
QS other_quests........
.......
{*}[2]
{
0 ROOT_QUEST -2 -1
-1 some_quest -3 -7
...............
}
{*}[3]
{
0 ROOT_QUEST -2 -1
-1 some_quest -4 -6
...............
}
......
================== end of the tree file ==================
What I did:
I created two question set files. One is with the name "question-top.hed" which includes only one question that I selected. The other one is with the name "question-all.hed" which has all the questions for training including the "root-node question"
First, I use HHEd with "question-top.hed" to do an initial clustering. The resulting tree is saved in top-mgc.inf. All the trees has only two leafs, eg." 0 TOP_QUEST "mgc_s2_2" "mgc_s2_1" ". Second, I used HHEd with "question-all.hed" and -q option. In this step, I added "LT /tree/cmp/top-mgc.inf" before the TB command, which is my reference tree.
What I got:
The expected result is that the cluster start from the specified root question and continues as it always did. However, the resulting tree-mgc.inf is the same as the reference/initial tree, no matter what -q value I set.
I think my usage is not correct, but don't know why. Please teach me.
At 2011-04-21 03:51:30，"Kei Hashimoto"<bonanza@xxxxxxxxxxxxxxx> wrote:
Hi,
The -q option is used to set the question in clustering.
When you set the -q value to 0 or 1, you can create larger tree than the reference tree.
When the -q value is set to 1, the standard clustering will be performed after the same tree as the reference tree is created.
When the -q value is set to 0, the question which the gain of likelihood is less than threshold will be not used even if the reference tree is set.
When you set the -q value to 2 or 3, you cannot create larger tree than the reference tree.
And, if you want to create the same tree as the reference tree even though the gain of likelihood is less than threshold, you should set the -q value to 3.
It will work as like IT command in HHEd.
When the -q value is set to 2, it will work as like back-off according to the threshold.
Regards,
Kei
(2011/04/21 1:22), 那兴宇 wrote:
Hi,
Thanks for answering, Kei.
I don't understand the -q values very clearly. I can tell that they stop splitting according to distance threshold or occ. But I cannot understand the explanation of "standard cluster will not be performed". And why the occ threshold is said to be 0 other than the values commonly used?
And what is the relationship between the reference tree and the -q values. I will try 0 and 1 tomorrow and see what happens.
At 2011-04-21 00:09:18，"Kei Hashimoto"<bonanza@xxxxxxxxxxxxxxx> wrote:
Hi,
I think you should set the -q value to 0 or 1.
The difference between 0 and 1 is the stopping criterion when reference trees are used.
When the value is set to 0, clustering is stopped even though you use reference trees.
Regards,
Kei
(2011/04/21 0:47), 那兴宇 wrote:
Hi,
I tried HHEd in HTS-2.2beta in this way:
1. Use a question set including only one question that I wanted to set as the root node to cluster a initial tree, which I got:
QS A0_0_TYPE=EN { ...... }
{*}[2]
{
0 A0_0_TYPE=EN "mgc_s2_2" "mgc_s2_1"
}
......
This is the resulting tree file.
2. Then I tried HHEd with -q option and a full version of question set. I added a LT command before TB to load the initial tree. And the -q value is set to 2. Then I make voice.
However, the resulting tree was exactly the same as the initial tree above. Do I used the -q option in a wrong way or the value is not appropriate?
The top node question is not included in the full question set.
Please inform me about how to use the -q option of HHEd. Thanks!
At 2011-04-19 23:03:24，"Keiichiro Oura"<uratec@xxxxxxxxxxxxxxx> wrote:
Hi,
HHEd in HTS-2.2 beta can do it with '-q' option.
Before TB command, LT command can be used.
Regards,
Keiichiro Oura
2011/4/19 那兴宇<nxy-yzqs@xxxxxxx>:
Hi, all
I want to set a specified question to be used in the root node of the state
decision tree. Which edit command of HHEd should I use? If there is none,
how should I do with the current version to specify a root node question?
Please give some suggestions, thanks!
--
Na Xingyu
Beijing Institute of Technology
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Nagoya Institute of Technology
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Kei Hashimoto
bonanza@xxxxxxxxxxxxxxx
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