Xapian devel - Apr 2012 - Implementing the tf-idf weighting scheme

Hi, all:

This is the basic implementation of tf-idf scheme (basic scheme used in
SMART) that can be used in the Xapian. It might still  need some futher
revision, but I believe it works anyway.:)

I modified the weight.h to define a subclass Tf_idfWeight and add a new
file tf_idf.cc in ../weight in the repo, to implement Tf_idfWeight.

Here is the git diff patch:

https://gist.github.com/2422049

I think the next thing to do is register this scheme to Xapian and write
some test to see whether or not it works?

I'm grepped the current BM25Weight, TradWeight and BoolWeight, and find
clues about Enquire::set_weighting_scheme( ). But something more should be
done to understand it.


Best,

Jiuding
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.xapian.org/pipermail/xapian-devel/attachments/20120420/129e0730/attachment.html>

And the patch file is in the attachment.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.xapian.org/pipermail/xapian-devel/attachments/20120420/4ba8eac8/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: report3.patch
Type: application/octet-stream
Size: 4022 bytes
Desc: not available
URL:
<http://lists.xapian.org/pipermail/xapian-devel/attachments/20120420/4ba8eac8/attachment-0002.obj>