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To: Jon_Yamron@dragonsys.com
From: George Doddington <doddington@nist.gov>
Subject: Re: Proposed change to the topic tracking task
Date: Wed, 09 Aug 2000 18:06:05 -0400
Jon_Yamron@dragonsys.com wrote:
>
> P.S. Where do you get 1500? I thought it was 120 topics x (2^4 - 1 for
> combinatorics) x 2 conditions = 3600, plus 120 for the Nt=1 eval.
Actually I made a mistake. It should be 15 different possible sets
of training stories for each topic, which would make 1800 (=15x120)
rather than 1500. The 15 come from drawing all possible different
sets of training stories from a master set of 4 on-topic stories:
4 ways for Nt=1, plus 6 ways for Nt=2, plus 4 ways for Nt=3, plus
1 way for Nt=4. Considering both languages gives the 3600. So
you are right. (I never realized that the number of different
combinations of N things is 2^N - 1 -- neat!)
--
George Doddington at NIST: doddington@nist.gov or 301/975-3261
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Last updated Tue Sep 19 14:30:54 2000