Martin Radford writes:
>I've been running 2.60-pr1 since this morning (thanks to Theo for his
>speedy assistance with a Perl 5.005-related bug).  I've noticed that
>nearly all the spams I've had so far have come up with BAYES_99 and
>that the probability is given as 1.000.
>
>With 2.55 I didn't get BAYES_99 as often (though spam did generally
>get BAYES_70 and above), and the scores weren't very much higher than
>0.990.  So I was surprised to see so many getting 1.000.
>
>My question is: is this expected behaviour?  Is Bayes in 2.60 that
>much better than in 2.5x?

It's using a scheme called chi-combining, which is more efficient
at combining Bayes scores into a "correct" diagnosis than the traditional
"gary-combining" scheme.   As a side effect, the results cluster
more around 0.0, 0.5, and 1.0 than the old classifier did.

--j.


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