[Spambayes] New option: summarize_email_prefixes
Neale Pickett
neale at watchguard.com
Wed Dec 11 22:02:16 EST 2002
Skip Montanaro <skip@pobox.com> writes:
> It's not a big win, but "pfxlen:big" is a very strong spam indicator.
> It might help on small messages without many other clues. I'd like
> others to give it a try and post their results.
It didn't make one bit of difference for me. So if's helpful to you,
I'm okay with it :)
"""
cv1s -> cv2s
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
-> <stat> tested 200 hams & 200 spams against 800 hams & 800 spams
false positive percentages
1.000 1.000 tied
1.000 1.000 tied
2.000 2.000 tied
3.000 3.000 tied
0.000 0.000 tied
won 0 times
tied 5 times
lost 0 times
total unique fp went from 14 to 14 tied
mean fp % went from 1.4 to 1.4 tied
false negative percentages
0.500 0.500 tied
0.500 0.500 tied
0.000 0.000 tied
0.500 0.500 tied
0.000 0.000 tied
won 0 times
tied 5 times
lost 0 times
total unique fn went from 3 to 3 tied
mean fn % went from 0.3 to 0.3 tied
ham mean ham sdev
4.39 4.39 +0.00% 16.31 16.31 +0.00%
3.62 3.62 +0.00% 14.22 14.22 +0.00%
5.01 5.01 +0.00% 18.67 18.67 +0.00%
4.94 4.94 +0.00% 19.29 19.29 +0.00%
4.20 4.21 +0.24% 14.37 14.38 +0.07%
ham mean and sdev for all runs
4.43 4.43 +0.00% 16.71 16.71 +0.00%
spam mean spam sdev
99.23 99.23 +0.00% 6.99 6.99 +0.00%
99.26 99.26 +0.00% 7.41 7.41 +0.00%
99.96 99.96 +0.00% 0.31 0.25 -19.35%
98.96 98.96 +0.00% 8.51 8.51 +0.00%
99.63 99.63 +0.00% 2.71 2.71 +0.00%
spam mean and sdev for all runs
99.41 99.41 +0.00% 6.07 6.07 +0.00%
ham/spam mean difference: 94.98 94.98 +0.00
"""
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