[Xapian-discuss] How to get term weight?

[zhiguo li]

Hi, Olly,

Sorry. I didn't get the last sent email so I thought for some reason last
email wasn't sent successfully.

Kevin

On Tue, Nov 18, 2008 at 3:12 PM, Olly Betts <olly at survex.com> wrote:

> On Tue, Nov 18, 2008 at 03:02:31PM -0500, zhiguo li wrote:
> > I have a simple question and I hope somebody could help me: given a Mset
> > "matches" and a Query "query", how do I get the weight of the terms in
> the
> > query? Suppose I use the BM25 weighting schme and I have the document
> > statistics from the database "db".
>
> You already asked this question only yesterday.  Please don't reask the
> same question just because you don't get an instant response.  All
> you'll do is irritate list subscribers and most likely decreases the
> likelihood that you'll get a useful response.
>
> > Or put it another way: I followed the code in Xapian and I know that when
> > Xapian performed the search, it computed "get_sumpart" and
> "get_sumextra".
> > How can I retrieve the query term weight for each document in the Mset?
>
> You can't.  We don't keep the weight contributions around - only the
> sum of the contributions over all matching terms for documents which
> made it into the MSet.
>
> Cheers,
>     Olly
>