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From Otis Gospodnetic <otis_gospodne...@yahoo.com>
Subject Re: hibernate and algorithm for asing score to hits
Date Tue, 05 Oct 2004 10:35:33 GMT
Hello,

Lucene's API includes classes that let you explain hit scores (e.g.
http://research.yahoo.com/demo/nutch/explain.xml?idx=6&id=4752515&query=web)

Otis

--- "d2clon@desarrolladores.org" <d2clon@desarrolladores.org> wrote:

> (first excuse me for my english)
> 
> hi people..
> 
> we are programming a few tests battery to see how lucene creates the
> scores in 
> a search into a very simple and controllable documents.
> 
> but we don't understand why the results looks not ok for us..
> 
> i am going to try to explain, the details of the tests described at
> botton..
> 
> if you look the tests you will see:
> 
> in test 1)
> query: info:house
> lucene returns a 50.00 score for this document
> id      info
> -----   ------
> house2	house noise noise noise
> 
> and the same score for this document:
> id      info
> -----   ------
> house3	house noise noise noise noise
> 
> 
> in test 2)
> query: info:house
> 
> lucene returns more score for this document:
> id      info
> -----   ------
> house3	noise noiseso noise noiseso noise noiseso house house house
> house
> 
> than for this one:
> id      info
> -----   ------
> house5	noise noiseso noise noiseso noise noiseso house house house
> house house 
> house
> 
> 
> 
> i have seen lucene's algoritm for creating this scores, i don't
> understand all 
> but i 
> think the results of these searches are not ok for me.. 
> 
> i need comments, or urls to study and improve my search method
> 
> 
> thanks for all
> d2clon
> 
> 
> 
> 
> 
> ---------------------------------------------------------------
> TESTS
> ---------------------------------------------------------------
> 
> 
> 
> 
> we always execute this query, using the StandardAnalizer:
> query: info:house
> 
> 
>  test 1
> ---------------------------------------
> 
> document list:
> 
> id	info
> ----	-------
> house0	house noise
> house1	house noise noise
> house2	house noise noise noise
> house3	house noise noise noise noise
> house4	house noise noise noise noise noise
> nohouse	noise noiseso noise noiseso noise noiseso 
> 
> 
> scores:
> 
> id       score
> ----     -------
> house0    62.5	
> house1    50.0	
> house2    50.0	
> house3    43.75	
> house4    37.5
> 
> 
> 
> 
> 
> 
> 
>  test 2:
> ------------------------------------
> 
> document list:
> 
> id	info
> ----	-------
> house0	noise noiseso noise noiseso noise noiseso house
> house1	noise noiseso noise noiseso noise noiseso house house
> house2	noise noiseso noise noiseso noise noiseso house house house
> house3	noise noiseso noise noiseso noise noiseso house house house
> house
> house4	noise noiseso noise noiseso noise noiseso house house house
> house house
> house5	noise noiseso noise noiseso noise noiseso house house house
> house house 
> house
> house6	noise noiseso noise noiseso noise noiseso house house house
> house house 
> house house
> house7	noise noiseso noise noiseso noise noiseso house house house
> house house 
> house house house
> house8	noise noiseso noise noiseso noise noiseso house house house
> house house 
> house house house house
> house9	noise noiseso noise noiseso noise noiseso house house house
> house house 
> house house house house house
> nohouse	noise noiseso noise noiseso noise noiseso noise noiseso noise
> noiseso 
> noise noiseso nohouse
> 
> scores:
> 
> id       score
> ----     -------
> house9    79.0569
> house8    75.0
> house7    70.7107
> house6    66.1438
> house3    62.5
> house5    61.2372
> house4    55.9017
> house2    54.1266
> house1    44.1942
> house0    37.5
> 
> 
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