From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Thu, 23 May 2013 16:44:21 +0000 (+0100)
Subject: Fix probability calculations.
X-Git-Tag: 0.5.5~31
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9347b6450db4e7bc29a36fe84c72a1835d0f6cb6;p=thirdparty%2Frspamd.git

Fix probability calculations.
---

diff --git a/src/classifiers/bayes.c b/src/classifiers/bayes.c
index 2a8ae44c72..24174187f0 100644
--- a/src/classifiers/bayes.c
+++ b/src/classifiers/bayes.c
@@ -169,7 +169,7 @@ bayes_classify_callback (gpointer key, gpointer value, gpointer data)
 		spam_freq = ((double)spam_count / MAX (1., (double)cd->total_spam));
 		ham_freq = ((double)ham_count / MAX (1., (double)cd->total_ham));
 		spam_prob = spam_freq / (spam_freq + ham_freq);
-		bayes_spam_prob = (0.5 + spam_prob * total_count) / (double)total_count;
+		bayes_spam_prob = (0.5 + spam_prob * total_count) / (1. + total_count);
 		cd->spam_probability += log (bayes_spam_prob);
 		cd->ham_probability += log (1. - bayes_spam_prob);
 		cd->processed_tokens ++;