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From Chris Fraschetti <frasche...@gmail.com>
Subject Re: sorting and score ordering
Date Thu, 14 Oct 2004 20:53:22 GMT
currently rank is indexed as Field.Keyword("rank_field", somerank);

all ranks will be 0-100 .... so i format them as  0###   to make
lucene sort them correctly. For my testing purposes, I confine the
range to 0-10.. so all ranks are indexed and retreived as 000-010
respectively.

if i create a sort with the sortfield array of score,rank gives me the
identical results to only sorting on score. BUT a sort of rank only
does sort by rank.

-Chris


On Thu, 14 Oct 2004 16:49:12 -0400, Erik Hatcher
<erik@ehatchersolutions.com> wrote:
> On Oct 14, 2004, at 4:40 PM, Chris Fraschetti wrote:
> > If I print the different hit score for each doc, they are the same..
> > but the secondary sorting still does not take affect. is it possible
> > that even though the float returned to me and i print out, internally
> > has even more precision and they are indeed not the same? I'm getting
> > ready to edit the lucene source and recompile.. but I just wanted to
> > make sure that this is indeed my problem.
> 
> How did you index your rank field?  That has bearing on how sorting
> works.  What are the values of the rank field like?  Numeric?
> 
>        Erik
> 
> 
> 
> >
> > -Chris
> >
> >
> > On Thu, 14 Oct 2004 12:42:37 -0400, Richard Alpert
> > <richard.alpert@cnet.com> wrote:
> >> Oh, yeah, of course.  I'm sorry, I wasn't reading thoroughly enough.
> >>
> >> Richard
> >>
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: Chris Fraschetti [mailto:fraschetti@gmail.com]
> >> Sent: Thursday, October 14, 2004 12:42 PM
> >> To: Richard Alpert
> >> Subject: Re: sorting and score ordering
> >>
> >> Richard, thank you, but i would need the score to be changed inside
> >> lucene in order for the sort to work properly... my earlier questions
> >> was in regards to rounding the score internally in order to allow for
> >> a secondary sort to take hold when similar results... say to a precion
> >> of 0.## occur.
> >>
> >> Thanks,
> >> Chris
> >>
> >> On Thu, 14 Oct 2004 12:36:15 -0400, Richard Alpert
> >> <richard.alpert@cnet.com> wrote:
> >>> Chris, what about something like
> >>>
> >>>   score1 = ((float)(int(score*100+0.5)))/100.00
> >>>
> >>> 'score1' will equal 'score' rounded to the nearest 0.01.
> >>>
> >>> Richard
> >>>
> >>>
> >>>
> >>>
> >>> -----Original Message-----
> >>> From: Chris Fraschetti [mailto:fraschetti@gmail.com]
> >>> Sent: Thursday, October 14, 2004 12:14 PM
> >>> To: Lucene Users List
> >>> Subject: Re: sorting and score ordering
> >>>
> >>> Is there a way to generalize the score that lucene is comparing ?
> >>> I.e.
> >>> round it off to say a precision of 0.## ? In order to make this sort
> >>> work better with 'duplicate' values? (by my terms... hits that have
> >>> scores within within a certain distance of eachother.)
> >>>
> >>> -Chris
> >>>
> >>> On Thu, 14 Oct 2004 11:27:34 -0400, Erik Hatcher
> >>> <erik@ehatchersolutions.com> wrote:
> >>>> On Oct 13, 2004, at 5:40 PM, Chris Fraschetti wrote:
> >>>>> and finally if i do....
> >>>>>
> >>>>> SortField score_sort = ScoreField.FIELD_SCORE;
> >>>>> SortField rank_sort = new SortField(RANK_FIELD, true);
> >>>>> SortField[] sort_fields = {score_sort, rank_sort};
> >>>>> Sort sort = new Sort(sort_fields);
> >>>>> hits = searcher.search(query, sort);
> >>>>>
> >>>>> I get the same results as I did with the score_sort only... no
> >>>>> change
> >>>>> in the ordering of the rank is there... any ideas? It looks to me
> >>>>> as
> >>>>> if it's completely ignoring it.
> >>>>
> >>>> This is sorting first by score and then by your rank field.  The
> >>>> rank
> >>>> field sort only applies when the scores are the same.  I suspect
> >>>> you're
> >>>> getting different scores so you'd never see rank come into play.
> >>>>
> >>>> Display the score and rank in your results to see for sure.
> >>>>
> >>>>        Erik
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> --------------------------------------------------------------------
> >>>> -
> >>>> To unsubscribe, e-mail: lucene-user-unsubscribe@jakarta.apache.org
> >>>> For additional commands, e-mail: lucene-user-help@jakarta.apache.org
> >>>>
> >>>>
> >>>
> >>> --
> >>> ___________________________________________________
> >>> Chris Fraschetti, Student CompSci System Admin
> >>> University of San Francisco
> >>> e fraschetti@gmail.com | http://meteora.cs.usfca.edu
> >>>
> >>>
> >>>
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: lucene-user-unsubscribe@jakarta.apache.org
> >>> For additional commands, e-mail: lucene-user-help@jakarta.apache.org
> >>>
> >>>
> >>
> >> --
> >> ___________________________________________________
> >> Chris Fraschetti, Student CompSci System Admin
> >> University of San Francisco
> >> e fraschetti@gmail.com | http://meteora.cs.usfca.edu
> >>
> >
> >
> > --
> > ___________________________________________________
> > Chris Fraschetti, Student CompSci System Admin
> > University of San Francisco
> > e fraschetti@gmail.com | http://meteora.cs.usfca.edu
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: lucene-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: lucene-user-help@jakarta.apache.org
> 
> 
> ---------------------------------------------------------------------
> 
> 
> To unsubscribe, e-mail: lucene-user-unsubscribe@jakarta.apache.org
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> 
> 


-- 
___________________________________________________
Chris Fraschetti, Student CompSci System Admin
University of San Francisco
e fraschetti@gmail.com | http://meteora.cs.usfca.edu

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