Mailman 3 February 2006 - spambayes-dev

sb_imapfilter: bad FETCH response
by David Abrahams Aug. 7, 2006

Aug. 7, 2006

FYI, with the CVS HEAD as of 18 January: Loading state from /usr/home/dave/hammie.new.db database /usr/home/dave/hammie.new.db is a new database Loading database /usr/home/dave/hammie.new.db... Done. Account: www.stlport.com:993 Training Training ham folder HamBox Traceback (most recent call last): File "/usr/home/dave/src/spambayes/scripts/sb_imapfilter.py", line 1283, in ? run() File "/usr/home/dave/src/spambayes/scripts/sb_imapfilter.py", line 1261, in run imap_filter.Train() File "/usr/home/dave/src/spambayes/scripts/sb_imapfilter.py", line 1004, in Train num_trained = folder.Train(self.classifier, is_spam) File "/usr/home/dave/src/spambayes/scripts/sb_imapfilter.py", line 888, in Train for msg in self: File "/usr/home/dave/src/spambayes/scripts/sb_imapfilter.py", line 799, in __iter__ yield self[key] File "/usr/home/dave/src/spambayes/scripts/sb_imapfilter.py", line 831, in __getitem__ data = self.imap_server.extract_fetch_data(response_data) File "/usr/home/dave/src/spambayes/scripts/sb_imapfilter.py", line 455, in extract_fetch_data msg_data = self._extract_fetch_data(msg) File "/usr/home/dave/src/spambayes/scripts/sb_imapfilter.py", line 428, in _extract_fetch_data raise BadIMAPResponseError("FETCH response", response) __main__.BadIMAPResponseError: The command 'FETCH response' failed to give an OK response. (' UID 1967)',) Rolling back to the last released version of spambayes makes this problem go away. -- Dave Abrahams Boost Consulting www.boost-consulting.com

1 1

Bayesian classifier that uses Bayes factors
by Olav Feb. 24, 2006

Feb. 24, 2006

Hello all, I have a simple idea for the implementation of a Bayesian classifier that uses Bayes factors. Suppose we have the word "viagra" in the following situation: The word was found in 10 ham mails, and was not seen in 20 ham mails (=total 30 ham emails) The word was found in 50 spam mails, and was not seen in 30 spam mails. The procedure now is to calculate g(w)=10/(10+20) b(w) = 50/(50+30) and then p(w)=b(w)/(b(w)+g(w)) I suggest the following calculation: first add a prior value of 1 to each cell (so no problem with non-observed words), then calculate the log(odds): LogOdds=log (( 11*31 ) / (21*51)) The standard deviation is given by stdev = sqrt( 1/11+1/21+1/51+1/31 ) Next is to calculate the Bayes factors that a word is a spam indicator versus that is not a spam indicator: help=pNorm (0, LogOdds), stdev ) where pNorm is in the words of Gary " the inverse normal function, used to derive a p-value from a normal-distributed random variable" Bayes factors is given by BF=help/(1-help) The interpretation is simple: if the value is larger than 1, it is more likely being spam. The number can be given a better interpretation, but for the moment, the criterion is: larger than 1=spam, smaller than 1=ham. For Bayes factor, the product rule applies: the total Bayes factor is the product of all the Bayes factors of the individual words in the email to be classified. BF_total=BF(word_1) * BF(word_2) *...* BF(word_n) Some values using 1 word: H: 10/10 S:50/50 BF=1 H: 100/100 S:500/500 BF=1 ----------------------------------- H: 1/2 S:3/4 BF=1.5 H: 10/20 S:30/40 BF=4.3 ----------------------------------- H: 3/10 S:50/10 BF=very small Any suggestions? All the best, Olav Laudy

1 0

Remixed your site to XHTML (fwd)
by skip＠pobox.com Feb. 20, 2006

Feb. 20, 2006

Forwarding this along. It was sent to the listed SF admins for the SpamBayes project. Probably deserves a broader audience. Skip

2 2

contact - business
by webgota＠webgota.com Feb. 18, 2006

Feb. 18, 2006

My name is Carlos and I work for webgota.com internet solutions. Just to make new contacts, I'm sending this e-mail to tell you that I'm available for all kind of on-line and internet free lance and temp jobs (HTML, PHP, ASP, MySQL, SQL Server, Flash, JAVA, Javascript, VBScript, Delphi and also Banners, Advertisements, Designs, Logos, Adobe PDF Docs, etc...). I'm really good working against the time and I'm also on skype, so if your are too busy or have too much to do and a very short deadline, please count on me to help. Skype me anytime (really, anytime) and have one more skillful partner at your side. You can see my work at: www.webgota.com (samples on the "show room" section) Thank you, A. Carlos da Silva www.webgota.com •skype: webgota webgota(a)webgota.com +55 16 39163589 •(skype me anytime)

1 0

NO SUBJECT
by Roberto Sahagun Feb. 3, 2006

Feb. 3, 2006

How can I spam all the email witch has a blank " " subject. I get good email from a person then the same person will send junk and 90% of the time the junk will not have a subject in the subject field. * # rsahagun(a)betterbeverages.com

1 0