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From "sendtoprat@yahoo.co.in" <sendtop...@yahoo.co.in>
Subject Re: Modify Norm
Date Fri, 13 Feb 2009 00:19:27 GMT

Ya. Earlier we were sorting only. But sorting didn't always result in optimal
ranking as it completely ignores Lucene score. We do not want that. We want
a combination of different features, and not necessarily sorting by one
field values.

Pratyush


Michael McCandless-2 wrote:
> 
> 
> Can you simply sort by that string field?  (Which also uses FieldCache  
> under the hood to get the values).
> 
> Mike
> 
> On Feb 12, 2009, at 3:46 PM, sendtoprat@yahoo.co.in wrote:
> 
>>
>> I guess I could use, 	String[] s =
>> ExtendedFieldCache.EXT_DEFAULT.getStrings(reader, fieldname);
>> It will consume memory but should not be that bad. For my index this  
>> field
>> has sortable string value which I could use in my model. I only need  
>> to do
>> this for one field. Comment ?
>>
>> Pratyush
>>
>> Michael McCandless-2 wrote:
>>>
>>>
>>> [You'd probably get more responses on java-user@ instead of general@]
>>>
>>> Could you use per-field boost?
>>>
>>> Or, since it sounds like you have a separate field with the boost you
>>> want,
>>> maybe you could do this all at search time using a function query?
>>>
>>> An advanced possibility is to make your own indexing chain, and use a
>>> different
>>> NormsWriter, but that's an extremely big hammer to pull out for this
>>> nail.
>>>
>>> Mike
>>>
>>> sendtoprat@yahoo.co.in wrote:
>>>
>>>>
>>>> Hi
>>>> How can I set my own norm value during indexing time. From my quick
>>>> reading
>>>> of code, I believe that norm values are written by NormsWriter class
>>>> which
>>>> is called from final class DocumentsWriter. Norm values are set by
>>>> calling
>>>> org.apache.lucene.search.Similarity#lengthNorm(String fieldName, int
>>>> numTokens). But I need to set the norm using the field value which
>>>> is a
>>>> float number. I will be using this norm for my retrieval model. I
>>>> cannot use
>>>> document.setBoost(), as i need to boost the fields differently.
>>>>
>>>> thanks
>>>> Pratyush
>>>> -- 
>>>> View this message in context:
>>>> http://www.nabble.com/Modify-Norm-tp21959177p21959177.html
>>>> Sent from the Lucene - General mailing list archive at Nabble.com.
>>>>
>>>
>>>
>>>
>>
>> -- 
>> View this message in context:
>> http://www.nabble.com/Modify-Norm-tp21959177p21984666.html
>> Sent from the Lucene - General mailing list archive at Nabble.com.
>>
> 
> 
> 

-- 
View this message in context: http://www.nabble.com/Modify-Norm-tp21959177p21987878.html
Sent from the Lucene - General mailing list archive at Nabble.com.


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