Note that the dot product in the vector space world is heavily assoicated with the
concept of correlation coeficiet n statistics:
"A correlation coefficient is a number between -1 and 1 which measures the degree to
which two variables are linearly related. If there is perfect linear relationshi
istoph Goller [mailto:[EMAIL PROTECTED]
> Sent: Sunday, October 31, 2004 8:55 AM
> To: Lucene Developers List
> Subject: Re: About Hit Scoring
>
> Chuck Williams schrieb:
> > That's an interesting point that helps to better analyze the
situation.
> &
L PROTECTED]
> Sent: Sunday, October 31, 2004 9:02 AM
> To: Lucene Developers List
> Subject: Re: About Hit Scoring
>
> Chuck Williams schrieb:
> > Addendum: I forgot probably the most important point. The
current
> > normalization in Hits changes
Chuck Williams schrieb:
Addendum: I forgot probably the most important point. The current
normalization in Hits changes the final score so that it is not the
distance to the query-orthogonal hyperplane. This normalization renders
the final score ambiguous, and more confused. It's ambiguous sinc
Chuck Williams schrieb:
That's an interesting point that helps to better analyze the situation.
It seems to me the units are arbitrary and so the distance in this case
is not very meaningful. I don't believe Lucene actually uses the
document vector -- it uses the orthogonal projection of the docum
ck Williams [mailto:[EMAIL PROTECTED]
> Sent: Sunday, October 31, 2004 8:13 AM
> To: Lucene Developers List
> Subject: RE: About Hit Scoring
>
> That's an interesting point that helps to better analyze the
situation.
> It seems to me the units are arbitrary and so the
That's an interesting point that helps to better analyze the situation.
It seems to me the units are arbitrary and so the distance in this case
is not very meaningful. I don't believe Lucene actually uses the
document vector -- it uses the orthogonal projection of the document
vector into the hype
