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From Karl Wettin <karl.wet...@gmail.com>
Subject Re: Help understanding fieldNorm
Date Mon, 05 Oct 2009 10:39:09 GMT
sorry, I ment title.

5 okt 2009 kl. 11.57 skrev Simon Willnauer:

> Ole-Martin, did you mention that you did not change the URL value  
> but the
> title?
>
> simon
>
> On Mon, Oct 5, 2009 at 11:52 AM, Karl Wettin <karl.wettin@gmail.com>  
> wrote:
>
>> Hi Ole-Martin,
>>
>> how many characters was it in the url in before and after update?
>>
>>
>>    karl
>>
>> 5 okt 2009 kl. 10.21 skrev Ole-Martin Mørk:
>>
>>
>> Hi. I am trying to understand Lucene's scoring algorithm. We're
>>> getting some strange results. First we search for a given page by  
>>> it's
>>> url. We get this result:
>>>
>>> 0.0014793393 = fieldWeight(url:"our super secret url" in 22),  
>>> product of:
>>> 1.0 = tf(phraseFreq=1.0)
>>> 32.31666 = idf(url: www=7327 host=321 com=7327 article=2456
>>> something=2 something=44 704290075=1)
>>> 4.5776367E-5 = fieldNorm(field=url, doc=22)
>>>
>>> When this is done, we use solrJ to read and write the document. The
>>> only change is the title of the document (appends the number 2)
>>>
>>> We search again and the fieldNorm is changed significantly:
>>>
>>> 9.874598 = fieldWeight(url:"our super secret url" in 0), product of:
>>> 1.0 = tf(phraseFreq=1.0)
>>> 31.598713 = idf(url: www=7328 host=322 com=7328 article=2457
>>> something=3 somthing=45 704290075=2)
>>> 0.3125 = fieldNorm(field=url, doc=0)
>>>
>>> Why does the value of fieldNorm change so much?
>>>
>>> Looking forward to your answers.
>>>
>>> --
>>> Ole-Martin Mørk
>>> http://twitter.com/olemartin
>>> http://flickr.com/olemartin
>>>
>>
>>
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