[spambayes-dev] Correcting training

Meyer, Tony T.A.Meyer at massey.ac.nz
Sat Sep 6 15:38:12 EDT 2003


> I really wonder what's going on here!  Since the very first 
> tests I ran last year, Nigerian scams have been absolutely 
> nailed for me.

Actually, I've looked more closely at my current results, and I wasn't
quite right.  Some are nailed for me - 100% (rounded), but others are
solidly unsure (50%ish).

An example of an unsure is below.  It looks like it just has too many
clues of each type; although there are almost twice as many spam clues
as ham, the ham ones are lower.  (The astute will notice that this is
with the uni/bigrams classifier change discussed a couple of weeks ago,
but I'm pretty sure I got these results without those changes, too).

=Tony Meyer

Spam Score: 53% (0.529219)


word                                spamprob         #ham  #spam
'*H*'                               0.941562            -      -
'*S*'                               1                   -      -
'problem,'                          0.00846406         36      1
'support for'                       0.0207407          47      9
'introduced'                        0.0230148          16      2
'header:Received:7 header:From:1'   0.023097          148     37
'header:Received:7'                 0.0258462         152     43
'resulted'                          0.025986           14      2
'the necessary'                     0.029065           21      5
'but for'                           0.0318429          19      5
'especially'                        0.0334112          36     12
'(for'                              0.0391162          26     10
'note that'                         0.0402315          38     16
'without the'                       0.0420951          24     10
'problem'                           0.0438073          64     31
'personally,'                       0.0440438           6      1
'since most'                        0.0440438           6      1
'exchange'                          0.0444059          15      6
'machines'                          0.0447368          13      5
'similar'                           0.0514281          44     25
'land'                              0.052521           14      7
'fact,'                             0.0529859          33     19
'and some'                          0.0535049          20     11
'faced with'                        0.0541178           6      2
'fear'                              0.0562448          10      5
'governments'                       0.0569628           7      3
'necessary'                         0.0611149          42     29
'me, and'                           0.0614101           4      1
'along with'                        0.0633712          47     34
'affected'                          0.0646973           6      3
'with them.'                        0.0665003           7      4
'development'                       0.0680235          30     23
'faced'                             0.0693546           9      6
'purpose'                           0.0704604          10      7
'action'                            0.0712681          32     26
'kept'                              0.0718108          19     15
'since'                             0.0732255          81     70
'along'                             0.0743269          54     47
'president and'                     0.0748206           4      2
'skip:d 10 you'                     0.0755361           6      4
'highly'                            0.0759678          32     28
'the information'                   0.0762971          21     18
'acceptance'                        0.0766624           3      1
'the nature'                        0.0766624           3      1
'and where'                         0.0771211           9      7
'properties'                        0.0786999          14     12
'let you'                           0.0798047          21     19
'and that'                          0.0808079          36     34
'before the'                        0.0837246          15     14
'george'                            0.0848469           9      8
'right now,'                        0.0857477           7      6
'should'                            0.0858574         154    160
'acceptable'                        0.0875871           5      4
'heads'                             0.0875871           5      4
'search for'                        0.0881218          16     16
'countries'                         0.0894356          13     13
'honest'                            0.0894382           4      3
'war'                               0.0905854          20     21
'seem'                              0.0909548          45     49
'mr. robert'                        0.908163            0      2
'now because'                       0.908163            0      2
'political history.'                0.908163            0      2
'president mr.'                     0.908163            0      2
'reform act'                        0.908163            0      2
'response and'                      0.908163            0      2
'rich white'                        0.908163            0      2
'safe keeping,'                     0.908163            0      2
'same experience'                   0.908163            0      2
'seeking genuine'                   0.908163            0      2
'skip:r 10 seeking'                 0.908163            0      2
'some few'                          0.908163            0      2
'some lunatics'                     0.908163            0      2
'stones avoid'                      0.908163            0      2
'surprised receive'                 0.908163            0      2
'taking everything'                 0.908163            0      2
'the eldest'                        0.908163            0      2
'the farms'                         0.908163            0      2
'the looming'                       0.908163            0      2
'the society.'                      0.908163            0      2
'transferred without'               0.908163            0      2
'veterans and'                      0.908163            0      2
'when zimbabwean'                   0.908163            0      2
'while 10%'                         0.908163            0      2
'wholly'                            0.908163            0      2
'will mapped'                       0.908163            0      2
'zimbabwean president'              0.908163            0      2
'are currently'                     0.917228            3    373
'finance'                           0.930836            1    153
'amount was'                        0.934783            0      3
'bent'                              0.934783            0      3
'could transferred'                 0.934783            0      3
'dilemma'                           0.934783            0      3
'few black'                         0.934783            0      3
'foreign account.'                  0.934783            0      3
'full name'                         0.934783            0      3
'header:Mime-version:1'             0.934783            0      3
'header:Return-Path:1 header:Mime-version:1' 0.934783            0
3
'money could'                       0.934783            0      3
'money was'                         0.934783            0      3
'must let'                          0.934783            0      3
'properties and'                    0.934783            0      3
'purchase new'                      0.934783            0      3
'residing'                          0.934783            0      3
'seeking for'                       0.934783            0      3
'subject:NEEDED'                    0.934783            0      3
'that family'                       0.934783            0      3
'this amount'                       0.934783            0      3
'through personal'                  0.934783            0      3
'reply this'                        0.945495            6   1164
'account where'                     0.949438            0      4
'for proper'                        0.949438            0      4
'fund,'                             0.949438            0      4
'had taken'                         0.949438            0      4
'have got'                          0.949438            0      4
'have lost'                         0.949438            0      4
'investing'                         0.949438            0      4
'murdered'                          0.949438            0      4
'this private'                      0.949438            0      4
'was made'                          0.949438            0      4
'you accept'                        0.949438            0      4
'30% the'                           0.958716            0      5
'contact through'                   0.958716            0      5
'content-type:text/plain subject:YOUR' 0.958716            0      5
'security company.'                 0.958716            0      5
'skip:e 10 new'                     0.958716            0      5
'therefore, you'                    0.958716            0      5
'trustworthy'                       0.958716            0      5
'your reply'                        0.958716            0      5
'deposit the'                       0.965116            0      6
'states dollars'                    0.965116            0      6
'asylum'                            0.969799            0      7
'this proposal'                     0.969799            0      7
'your country.'                     0.969799            0      7
'total sum'                         0.973373            0      8
'your assistance'                   0.980349            0     11
'family and'                        0.981928            0     12
'this skip:r 10'                    0.983271            0     13
'invest'                            0.984429            0     14
'your full'                         0.984429            0     14
'and me,'                           0.985437            0     15
'got your'                          0.986322            0     16
'risk-free'                         0.987106            0     17
'subject: !'                        0.98951             0     21
'this transaction'                  0.990405            0     23
'urgent'                            0.990798            0     24
'amount money'                      0.991803            0     27
'and safe'                          0.99236             0     29
'confidential'                      0.995258            0     47
'deposited'                         0.99554             0     50
'this letter'                       0.996562            0     65
'this money'                        0.996614            0     66
'your business'                     0.997057            0     76

Message Stream:


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Date: 5 Sep 2003 12:57:23 -0000
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From: "george p. anderson" <anderson_family at roanokemail.com>
To: anderson_family at roanokemail.com
X-Originating-IP: [80.179.102.202]
Subject: YOUR ATTENTION IS NEEDED !
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Dear,Sir/Madam. 

You may be surprised to receive this letter from me,since you do not
know me personally, but for purpose of introduction. 

I am MR. GEORGE PETER ANDERSON, the first son of DR. VANDERS ANDERSON,
who was recently murdered in the land disputed in ZIMBABWE. I got your
contact through my personal search for a honest and trustworthy
individual,who can help my family in receiving this fund, for proper
investment and safe keeping, And I decided to write to you, for
assistance and business co-operation. Before the death of my father, he
had taken me to oversea to deposit the total sum of(US$16,8Million
United States Dollars ), with a security and finance company, as if he
foresaw the looming danger in Zimbabwe. 

The money was deposited in a box as gem stones to avoid demurrage from
the Security Company. This amount was made for the purchase of new
machines and chemicals for the farms and establishment of a new farm in
Switzerland. 

This land problem came when Zimbabwean President MR. ROBERT MUGABE,
introduced a new Land Act which wholly affected the rich white farmers
and some few black farmers. This resulted in killing and mob action by
Zimbabwean war veterans and some lunatics in the society. In fact, more
than thirteen(13) people have been killed because of this Land Reform
act. 

Heads of governments from the west especially Britain have condemned
Mugabe's new Land Reform Act and for this reason,SADC(Southern African
Development Community) heads of states have met and voiced their support
for Mr.Mugabe. South African President and the President of Malawi have
been sent by SADC to Britain to support Mugabe's new Land Reform Act. 

It is against this background, that I and my family who are currently
staying in europe right now because of this problem, have decided to
transfer my father's money to a foreign account. As the eldest son of my
father, I am saddled with this responsibility of seeking a genuine
account where this money could be transferred without the knowledge of
my government who are bent on taking everything we have got and other
African Governments seem to be playing along with them. 

I am faced with the dilemma of investing this amount of money in Africa
for fear of going through the same experience in future since most of
the countries have lost similar political history. However, the europian
union Foreign Exchange Policy where i am right now, does not allow such
investment as I am seeking for Asylum. I don"t want to disclose all the
information about me, and where i am residing right now for fear of
having my asylum request cancelled by the authorities in my host
country,but immediately you get back to me, I will give you the
necessary information. 

As a businessman, whom I have to entrust my future and that of my family
in his hands, I must let you know that this transaction is risk-free and
the nature of your business does not necessarily matter. Therefore, if
you accept to assist my family and me, we are willing to offer 30% of
the total sum for your assistance needed,60% for me and my family while
10% will be mapped out for any pre-transfer charges or bank charges. I
would wish to invest in your country on commercial properties and buying
of rents based on your advice or from experts in your country. 

If this proposal is acceptable by you, please, send me your contacts;
your full name and address,telephone and fax numbers. 

YOU SHOULD NOTE THAT THIS TRANSACTION IS HIGHLY CONFIDENTIAL AND SHOULD
BE KEPT WITHIN YOU ALONE. YOUR URGENT RESPONSE AND ACCEPTANCE WILL BE
HIGHLY APPRECIATED. PLEASE FORWARD YOUR REPLY TO THIS MY PRIVATE
ADDRESS: georgeanderson38 at indiatimes.com 

REGARDS, 

MR. GEORGE PETER ANDERSON (FOR THE FAMILY) 



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