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 6DE859A14 for ; Wed, 4 Apr 2012 04:07:38 +0000 (UTC) Received: (qmail 51475 invoked by uid 500); 4 Apr 2012 04:07:37 -0000 Delivered-To: apmail-mahout-user-archive@mahout.apache.org Received: (qmail 51407 invoked by uid 500); 4 Apr 2012 04:07:35 -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 51371 invoked by uid 99); 4 Apr 2012 04:07:34 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 04 Apr 2012 04:07:34 +0000 X-ASF-Spam-Status: No, hits=-0.5 required=5.0 tests=FREEMAIL_ENVFROM_END_DIGIT,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of ziad.kamel25@gmail.com designates 209.85.210.170 as permitted sender) Received: from [209.85.210.170] (HELO mail-iy0-f170.google.com) (209.85.210.170) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 04 Apr 2012 04:07:27 +0000 Received: by iaeh11 with SMTP id h11so1183781iae.1 for ; Tue, 03 Apr 2012 21:07:06 -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=MmPN1eYfBrgSY718BJsCFbUAFxl2C3Qcr8XZzRUmqCI=; b=vrWWOieNfsxKoklk1B1ZcpWvuV4VgCuLIi8YVFOLsog2gsy+3/fdvU7a3zyHUb2Nep 7lKJSFAvanonm7QcMtxS634v7WucAQwkDsCU8kmznZFLSzafHcPA+vNKqxPezYNIP+ez q8mrPu6D+5hnuUYhZuiEZZ/6gjrFsi8Xvva/yUg0tk945ef3As+03OIUEhMREfoRDdwz GJlBelY3a+EKdS6PB57ZOjVOg68rEsP95p9kZI19gM990vBdnNUFz7gvx0iaBF/UX/fr qZGO5f19jTujN3wlV4UEaTyYmwr5eO5hpPImXbuCZPZgTn5n4BVTNBhOqC6DE5nSmQIu 8P6A== MIME-Version: 1.0 Received: by 10.50.76.136 with SMTP id k8mr412796igw.2.1333512426226; Tue, 03 Apr 2012 21:07:06 -0700 (PDT) Received: by 10.231.79.197 with HTTP; Tue, 3 Apr 2012 21:07:06 -0700 (PDT) Date: Tue, 3 Apr 2012 23:07:06 -0500 Message-ID: Subject: Split data to training and test in CF From: ziad kamel To: user@mahout.apache.org Content-Type: text/plain; charset=ISO-8859-1 Hi ! I understand that reason behind splitting data to training and test during classification and clustering , but why we need to do that during CF ? We just select top X from list and and compare with good recommendations . Thanks