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List:       spamassassin-devel
Subject:    Re: hardware on ruleqa ... and perceptrons
From:       Justin Mason <jm () jmason ! org>
Date:       2010-04-26 9:55:35
Message-ID: m2h6c399e451004260255qce3960eav1f8dfd14f66cb5bf () mail ! gmail ! com
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On Sun, Apr 25, 2010 at 00:57, Sidney Markowitz <sidney@sidney.com> wrote:
> Adam Katz wrote, On 25/04/10 8:22 AM:
> > Today, I saw this in svn at masses/README.perceptron:
> 
> See this that Justin posted to sa-dev that explains the history of our
> using GA, then perceptron, then back to GA.
> 
> It also links to Duncan Findlay's thesis work on using logistic
> regression as a faster algorithm that gets better results, but I don't
> know what ended up happening with that.
> 
> http://mail-archives.apache.org/mod_mbox/spamassassin-dev/200707.mbox/%3C20070701224117.F1A7732D60@radish.jmason.org%3E
>  
> or if that link gets garbled, also archived at
> 
> http://www.mail-archive.com/dev@spamassassin.apache.org/msg21162.html

Yep.  Basically, the perceptron implementation seems to require a lot
of hand-tuning to
produce decent results.  The GA is a lot more "fire and forget", if slower.

--j.


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