TheBat! An antispam filter BayesIt!
Filtration of an entering spam by means of a plug-in BayesIt!
Antispamers filter BayesIt
the Filter developed Alexey Vinogradovym on algorithm of a filtration of Bayesthe Given method is based on statistical data collected with received letters. Here that the author on the site devoted writes to algorithm of Bayes - http://klirik.narod.ru/usefuls/bayesyan.htm
The essence of a method of a statistical filtration consists in application of the mathematical theorem of Bayes to incoming letters. This theorem allows to calculate probability of successful fulfilment of some event on the basis of statistics of fulfilment of this event in the past. With reference to a filtration of a spam: if 9 from 10 letters containing a notorious word "cow", are a spam, and only one - the "good" letter the theorem of Bayes allows to calculate, with what probability the following letter containing this word, will be a spam.
The method of Bayes means use of statistical estimated base - two sets ("cases") of letters, one of which is made of a spam, and another - from "good" letters. At creation of this base the quantity of ocurrences of each separate word (token) in each case is counted up, and on the basis of it for each token the estimation, or "spam" is calculated.
Download BayesIt 0.8.1 Release and also a Russifier to it (Language module BayesIt! (Russian)) it is possible on page of a product on a site of program The Bat!:
Adjustment Bayesit is not strongly complex, enough to esteem on-line the documentation located on the same site: http://www.ritlabs.com/ru/solutions/BayesIt.php