Mailing-List: contact user-help@mahout.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@mahout.apache.org
Received-SPF: pass (nike.apache.org: domain of ted.dunning@gmail.com
 designates 209.85.216.42 as permitted sender)
MIME-Version: 1.0
In-Reply-To: 
 <CAEccTyx=hPfH=fgRNt1jmi5RmJ2wsovLJnn=kmY1-rTFhUhGXw@mail.gmail.com>
References: 
 <CAA77SLsr2w1+dc1i=CQaigCr7OqwRTsMGsqS59eBj_A56kYOWg@mail.gmail.com>
 <CAEccTyx=hPfH=fgRNt1jmi5RmJ2wsovLJnn=kmY1-rTFhUhGXw@mail.gmail.com>
From: Ted Dunning <ted.dunning@gmail.com>
Date: Tue, 16 Aug 2011 15:12:21 -0700
Message-ID: 
 <CAJwFCa0YaDFFi4ukiEEwF_8XGDHbE+RyYL5NAFmorEFitYshAQ@mail.gmail.com>
Subject: Re: Vectors vs Preferences
To: user@mahout.apache.org
Content-Type: multipart/alternative; boundary=485b397dd2a9a05cfb04aaa6ad3a

--485b397dd2a9a05cfb04aaa6ad3a
Content-Type: text/plain; charset=UTF-8

Actually SGD is just this for classification.  It is (pretty) scalable and
definitely not normally parallel.

On Tue, Aug 16, 2011 at 11:16 AM, Sean Owen <srowen@gmail.com> wrote:

> There are no non-distributed counterparts for clustering and
> classification.
> It's not symmetric, and it would be better if it were, but it's perhaps no
> big sin. The benefits have outweighed the negatives, I think. Of course
> nobody would mind developing a scalable non-distributed clusterer /
> classifier -- but in all things, it's a question of whether anyone cares
> enough to write it and maintain it.
>

--485b397dd2a9a05cfb04aaa6ad3a--