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From Ole-Martin Mørk <olemar...@gmail.com>
Subject Re: Help understanding fieldNorm
Date Mon, 05 Oct 2009 10:45:31 GMT
I did not change the url. The length of the title was increased by 1, from
41 to 42 characters.
--
Ole-Martin Mørk


On Mon, Oct 5, 2009 at 12:39 PM, Karl Wettin <karl.wettin@gmail.com> wrote:

> 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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>>>
>
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