From user-return-18441-apmail-mahout-user-archive=mahout.apache.org@mahout.apache.org Wed Sep 11 21:19:15 2013 Return-Path: X-Original-To: apmail-mahout-user-archive@www.apache.org Delivered-To: apmail-mahout-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 5EBDD106B7 for ; Wed, 11 Sep 2013 21:19:15 +0000 (UTC) Received: (qmail 22153 invoked by uid 500); 11 Sep 2013 21:19:13 -0000 Delivered-To: apmail-mahout-user-archive@mahout.apache.org Received: (qmail 22112 invoked by uid 500); 11 Sep 2013 21:19:13 -0000 Mailing-List: contact user-help@mahout.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@mahout.apache.org Delivered-To: mailing list user@mahout.apache.org Received: (qmail 22104 invoked by uid 99); 11 Sep 2013 21:19:13 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 11 Sep 2013 21:19:13 +0000 X-ASF-Spam-Status: No, hits=1.7 required=5.0 tests=FREEMAIL_ENVFROM_END_DIGIT,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of barnold4238@gmail.com designates 209.85.212.53 as permitted sender) Received: from [209.85.212.53] (HELO mail-vb0-f53.google.com) (209.85.212.53) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 11 Sep 2013 21:19:08 +0000 Received: by mail-vb0-f53.google.com with SMTP id i3so6497132vbh.40 for ; Wed, 11 Sep 2013 14:18:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=Ic7QHtqcL95Kgsale9Q/f/0qkGnffwwBH/eeEq893OA=; b=veUj/oF3/RlP/zNCujmECU1TKUttr8ooZ+TR14ItorL/VuWkTAK26uTsYeF9gHgGbu p7SWsQySqKEWdT2lEBNSxJ9Mx2zyzP73S9ZiRbPqZk4PN4SjKvIVanCt7+VVmD1ia4xs BcPIKURNZtkY6Rpuw8wVb7V8KypzJhf8L4wB3xZwJZ3BmcSvNi1Z0hizjbEBsMf+gR18 msKLA47HKzJzEUxUvDguBDN1f2Bie+ZUNH4remaJ/QABC56Eb4h/dobpoi3+3QjpFO8s xxHIhMWeww9hEaUj74+Ilx+Iyq9JIjZeVRjvzK2sZrKIvEUrF4J30XLakUSkzzssmfTS XtHw== MIME-Version: 1.0 X-Received: by 10.58.146.71 with SMTP id ta7mr3171400veb.23.1378934327539; Wed, 11 Sep 2013 14:18:47 -0700 (PDT) Received: by 10.58.137.163 with HTTP; Wed, 11 Sep 2013 14:18:47 -0700 (PDT) Date: Wed, 11 Sep 2013 16:18:47 -0500 Message-ID: Subject: Item Based Collaborative Filtering Properties Question From: Brian Arnold To: user@mahout.apache.org Content-Type: multipart/alternative; boundary=047d7b5d4a30c3011304e6222a9d X-Virus-Checked: Checked by ClamAV on apache.org --047d7b5d4a30c3011304e6222a9d Content-Type: text/plain; charset=ISO-8859-1 Hi, I am currently trying to run the distributed Item Based Collaborative filtering algorithm on our Hadoop cluster, and I have a few questions regarding tweaking the various properties of the algorithm. For the maxPrefsPerUser,maxSimilaritiesPerItem, and maxPrefsPerUserItemSimilarity properties I was wondering if I could get a more detailed explanation of what these properties control. I saw the description in the code, but I am just wondering how changing these values will affect the results of the algorithm, and will increasing them result in a better recommendation. Thanks --047d7b5d4a30c3011304e6222a9d--