[spambayes-dev] Mine_received_headers

[Skip Montanaro]

    Tony> While I was testing, I figured I should do this one, too.  This
    Tony> gives me terrible results!

Hmmm...  Same for me.  I'm pretty sure it used to do better:

    filename:          std        mine     bigrams      minebi
    ham:spam:    1200:1268   1200:1268   1200:1268   1200:1268
    fp total:            2           1           4           4
    fp %:             0.17        0.08        0.33        0.33
    fn total:           64          86          51          66
    fn %:             5.05        6.78        4.02        5.21
    unsure t:          345         319         267         255
    unsure %:        13.98       12.93       10.82       10.33
    real cost:     $153.00     $159.80     $144.40     $157.00
    best cost:     $119.60     $115.40     $103.80     $107.20
    h mean:           2.36        1.79        2.32        1.70
    h sdev:           9.72        8.74       10.34        8.80
    s mean:          85.55       84.44       89.09       87.80
    s sdev:          26.06       27.85       23.48       25.33
    mean diff:       83.19       82.65       86.77       86.10
    k:                2.33        2.26        2.57        2.52

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