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 C6FF34851 for ; Sun, 3 Jul 2011 07:11:10 +0000 (UTC) Received: (qmail 29698 invoked by uid 500); 3 Jul 2011 07:11:08 -0000 Delivered-To: apmail-mahout-user-archive@mahout.apache.org Received: (qmail 29156 invoked by uid 500); 3 Jul 2011 07:10:52 -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 29125 invoked by uid 99); 3 Jul 2011 07:10:46 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 03 Jul 2011 07:10:46 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of ted.dunning@gmail.com designates 209.85.212.42 as permitted sender) Received: from [209.85.212.42] (HELO mail-vw0-f42.google.com) (209.85.212.42) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 03 Jul 2011 07:10:39 +0000 Received: by vwl1 with SMTP id 1so7535366vwl.1 for ; Sun, 03 Jul 2011 00:10:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=C8q9f64I2KVcUgTimRJle3sEJN9qsxtazxh4pojOGUo=; b=uXjlCfXVDdXT1xFK0kauXDB0bJh8Rghh/5vEc/2DvIXNLGjzU9DTT6dn3WT4eTTPpU aCff7uvetkzwJatzi0ufv5lzBAAQnC7hY2PxG9W2AK4nNeFE4zjoZIMZPFrADdQ9zQMi rEa7J/vzY6Lo7V46ByUvkH6PEcz2Cdbw4xRmM= Received: by 10.52.95.46 with SMTP id dh14mr6826669vdb.60.1309677019081; Sun, 03 Jul 2011 00:10:19 -0700 (PDT) MIME-Version: 1.0 Received: by 10.52.110.68 with HTTP; Sun, 3 Jul 2011 00:09:59 -0700 (PDT) In-Reply-To: References: From: Ted Dunning Date: Sun, 3 Jul 2011 00:09:59 -0700 Message-ID: Subject: Re: Dimensional Reduction via Random Projection: investigations To: user@mahout.apache.org Content-Type: multipart/alternative; boundary=20cf3071cc687e2bbf04a724f107 --20cf3071cc687e2bbf04a724f107 Content-Type: text/plain; charset=UTF-8 I would be very surprised if java.lang.Random exhibited this behavior. It isn't *that* bad. On Sat, Jul 2, 2011 at 6:49 PM, Lance Norskog wrote: > For full Random Projection, a lame random number generator > (java.lang.Random) will generate a higher standard deviation than a > high-quality one like MurmurHash. > --20cf3071cc687e2bbf04a724f107--