Return-Path: Delivered-To: apmail-lucene-mahout-user-archive@minotaur.apache.org Received: (qmail 63365 invoked from network); 22 Apr 2009 08:59:54 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 22 Apr 2009 08:59:54 -0000 Received: (qmail 94165 invoked by uid 500); 22 Apr 2009 08:59:53 -0000 Delivered-To: apmail-lucene-mahout-user-archive@lucene.apache.org Received: (qmail 94089 invoked by uid 500); 22 Apr 2009 08:59:53 -0000 Mailing-List: contact mahout-user-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mahout-user@lucene.apache.org Delivered-To: mailing list mahout-user@lucene.apache.org Received: (qmail 94079 invoked by uid 99); 22 Apr 2009 08:59:53 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 22 Apr 2009 08:59:53 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of mirko.gontek@uni-koeln.de designates 134.95.19.53 as permitted sender) Received: from [134.95.19.53] (HELO smtp-out.rrz.uni-koeln.de) (134.95.19.53) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 22 Apr 2009 08:59:44 +0000 X-Virus-Scanned: amavisd-new at uni-koeln.de Received: from smtp-auth.rrz.uni-koeln.de (smtp-auth.rrz.uni-koeln.de [134.95.19.93]) by smtp-out.rrz.uni-koeln.de (8.13.8/8.13.8) with ESMTP id n3M8xLmk017517 for ; Wed, 22 Apr 2009 10:59:22 +0200 Received: from [192.168.178.25] (dslb-088-077-133-144.pools.arcor-ip.net [88.77.133.144]) (authenticated as user gontekm using PLAIN bits=0) by smtp-auth.uni-koeln.de (8.13.8/8.13.8) with ESMTP id n3M8xLtF017497 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO) for ; Wed, 22 Apr 2009 10:59:21 +0200 Message-Id: <2FAE9DC4-4EDF-4366-99FE-E029C40E60AF@uni-koeln.de> From: Mirko Gontek To: mahout-user@lucene.apache.org Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v930.3) Subject: FileDataModel throws UnsupportedOperationException Date: Wed, 22 Apr 2009 10:59:20 +0200 X-Mailer: Apple Mail (2.930.3) X-Scanned-By: MIMEDefang 2.65 on 134.95.19.53 X-Virus-Checked: Checked by ClamAV on apache.org Hi, I experiment with Taste's FileDataModel to get a simple file-based example running. Getter methods are working, but getPreference() and removePreference() throw java.lang.UnsupportedOperationExceptions. Do I get something wrong here? Here is my test code: File f = new File("input/data.csv"); logger.debug(f.canWrite()); // true DataModel model = new FileDataModel(f); logger.debug("items "+ model.getNumItems()); // 3 logger.debug("users "+ model.getNumUsers()); // 3 Object[] prefs = model.getPreferencesForItemAsArray("evolution"); logger.debug("prefs for evolution: "+prefs.length); // 1 model.setPreference("tom", "physics", new Double(0.1)); // THROWS EXCEPTION // model.removePreference("tom","evolution"); // THROWS EXCEPTION java.lang.UnsupportedOperationException at org .apache .mahout .cf .taste.impl.model.file.FileDataModel.setPreference(FileDataModel.java: 322) The content of input/data.csv is: tom,evolution,1 anna,human,0 tim,biology,1 Thanks for your help! Mirko