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From Ian Lea <ian....@gmail.com>
Subject Re: How further reward documents matching more query terms?
Date Wed, 03 Feb 2010 09:46:19 GMT
If you read the javadocs and source for DefaultSimilarity you'll know
as much about it as I do, and see what the default is.  To customize
it, write your own subclass as I said before.


--
Ian.


On Tue, Feb 2, 2010 at 7:56 PM, Phan The Dai <thienthanhomenh@gmail.com> wrote:
> Dear Lan Lea,
> Thanks much for your reply.
> Please tell me more details of coord.
> what is its default?
> how to customize it, why we have to define.
>
> Thank you much for understading my question.
>
> On Sat, Jan 30, 2010 at 2:46 AM, Ian Lea <ian.lea@gmail.com> wrote:
>
>> I presume that quote is from the javadocs for Similarity.
>>
>> You can write your own Similarity class that extends DefaultSimilarity
>> and provides an implementation of public float coord(int overlap, int
>> maxOverlap) that does what you want, maybe by scaling up the value
>> returned, if I've understood the description properly.
>>
>> Tell lucene to use your class by calling
>> Similarity.setDefault(Similarity similarity).
>>
>> Warning: in my limited experience of trying to tweak lucene's scoring
>> I almost always make things worse rather than better.  YMMV.  Good
>> luck.
>>
>>
>> --
>> Ian.
>>
>>
>> On Fri, Jan 29, 2010 at 4:27 PM, Phan The Dai <thienthanhomenh@gmail.com>
>> wrote:
>> > "When searching with a query as a multi term query, users can further
>> reward
>> > documents matching more query terms through a coordination factor:
>> > *coord-factor(q,d)
>> > "
>> >
>> > *How we configure this factor?
>> > I am needing if documents matching more term queries then their score are
>> > higher.
>> >
>> > Please show me more details. Thanks 1
>> >
>>
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>>
>

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