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From: Felix Lee <flee@teleport.com>
Subject: Re: adaptive word scoring
Date: Fri, 29 Nov 1996 14:48:47 -0800	[thread overview]
Message-ID: <199611292248.OAA17024@kim.teleport.com> (raw)
In-Reply-To: Your message of 29 Nov 1996 09:09:22 +0100. <vafviapmifh.fsf@ls6.informatik.uni-dortmund.de>

Kai Grossjohann:
> IR people deal with this problem by using tf*idf (i == inverse);
> actually it's log(n/N) where n is the term frequency and N the
> document frequency.

hmm.  something like that might help.  lemme think about it.

but offhand, it's still going to overemphasize null words
(like "version") that are medium-low frequency.

and there's still the problem that adaptive scoring in
general tends to let scores grow without bound in a
meaningless way.

> I have no idea, though, how to estimate the idf for a newsgroup.  Any

just count frequency over subjects being scored.  it's
accurate enough for this purpose.
--


  reply	other threads:[~1996-11-29 22:48 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1996-11-29  5:25 Felix Lee
1996-11-29  8:09 ` Kai Grossjohann
1996-11-29 22:48   ` Felix Lee [this message]
1996-11-30 13:18     ` Lars Magne Ingebrigtsen
1996-12-01  8:39       ` Felix Lee
1996-11-29 15:45 ` Jan Vroonhof
1996-11-30  2:28   ` Felix Lee
1996-12-02  9:37   ` Steinar Bang
1996-12-02  9:40 ` Wesley.Hardaker
1996-12-05 18:49   ` Lars Magne Ingebrigtsen
1996-12-06  8:18     ` Wesley.Hardaker
1996-12-02 11:46 ` Hans de Graaff
1996-12-02 15:08   ` Robert Bihlmeyer
1996-12-05 18:50     ` Lars Magne Ingebrigtsen
1996-12-05 21:21       ` Sean Lynch
1996-12-06 10:39         ` Lars Magne Ingebrigtsen
1996-12-08 22:19           ` Sean Lynch
1996-12-11  0:44             ` Lars Magne Ingebrigtsen
1996-12-06 21:02         ` Janne Sinkkonen
1996-12-08 22:48           ` Sean Lynch
1996-12-10 22:25             ` nnspool virtual server shows funny numbers of articles C. R. Oldham
1996-12-11  0:42               ` Lars Magne Ingebrigtsen
     [not found]   ` <vcn2vvixpz.fsf@totally-fudged-out-message-id>
1996-12-03 13:51     ` adaptive word scoring Holger Franz
  -- strict thread matches above, loose matches on Subject: below --
1996-10-31  1:34 Adaptive " Sten Drescher
1996-11-05 15:51 ` Robert Bihlmeyer
1996-11-05 17:16   ` Per Abrahamsen
1996-11-05 21:24   ` Lars Magne Ingebrigtsen
1996-11-05 21:25 ` Lars Magne Ingebrigtsen
1996-08-04  2:57 Lars Magne Ingebrigtsen
1996-08-04 17:19 ` François Pinard

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