[hts-users:02803] Re: About state clustering

[那兴宇 <nxy-yzqs@xxxxxxx>]

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
>>>>>>
>>>>>> ________________________________
>>>>>> 体验网易邮箱2G超大附件，轻松发优质大电影、大照片，提速3倍!
>>>>>
>>>
>>>
>>>
>
>-- 
>-------------------------------
>Nagoya Institute of Technology
>Tokuda and Lee lab.
>Kei Hashimoto
>bonanza@xxxxxxxxxxxxxxx
>-------------------------------
>