Return-Path: Delivered-To: apmail-lucene-mahout-dev-archive@minotaur.apache.org Received: (qmail 20730 invoked from network); 5 Apr 2010 05:45:55 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 5 Apr 2010 05:45:55 -0000 Received: (qmail 17311 invoked by uid 500); 5 Apr 2010 05:45:55 -0000 Delivered-To: apmail-lucene-mahout-dev-archive@lucene.apache.org Received: (qmail 17268 invoked by uid 500); 5 Apr 2010 05:45:55 -0000 Mailing-List: contact mahout-dev-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mahout-dev@lucene.apache.org Delivered-To: mailing list mahout-dev@lucene.apache.org Received: (qmail 17260 invoked by uid 99); 5 Apr 2010 05:45:55 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 05 Apr 2010 05:45:55 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 05 Apr 2010 05:45:48 +0000 Received: from brutus.apache.org (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 1FFAF234C1EE for ; Mon, 5 Apr 2010 05:45:27 +0000 (UTC) Message-ID: <482110344.683021270446327116.JavaMail.jira@brutus.apache.org> Date: Mon, 5 Apr 2010 05:45:27 +0000 (UTC) From: "Sean Owen (JIRA)" To: mahout-dev@lucene.apache.org Subject: [jira] Commented: (MAHOUT-362) Computation of pairwise cosine similarities for Item-Based Collaborative Filtering In-Reply-To: <1425483435.680881270401927290.JavaMail.jira@brutus.apache.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/MAHOUT-362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12853312#action_12853312 ] Sean Owen commented on MAHOUT-362: ---------------------------------- Agree, I'm taking a first pass to unify this with the recommender stuff first. Then that should make it somewhat easier and clearer to think about refactoring up further. > Computation of pairwise cosine similarities for Item-Based Collaborative Filtering > ---------------------------------------------------------------------------------- > > Key: MAHOUT-362 > URL: https://issues.apache.org/jira/browse/MAHOUT-362 > Project: Mahout > Issue Type: New Feature > Components: Collaborative Filtering > Reporter: Sebastian Schelter > Attachments: MAHOUT-362.patch > > > Provides a map/reduce job to precompute the pairwise cosine similarities between the item vectors of the user-item-matrix. > The code uses a slightly modified version of the algorithm suggested in "Elsayed et al: Pairwise Document Similarity in Large Collections with MapReduce" (http://www.umiacs.umd.edu/~jimmylin/publications/Elsayed_etal_ACL2008_short.pdf) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.