Mailing-List: contact dev-help@commons.apache.org; run by ezmlm
Precedence: bulk
Reply-To: "Commons Developers List" <dev@commons.apache.org>
Received-SPF: pass (nike.apache.org: domain of ted.dunning@gmail.com
 designates 209.85.216.178 as permitted sender)
MIME-Version: 1.0
In-Reply-To: <20110708030638.E8C4C1407BD71@svoboda.polytechnique.org>
References: <20110708030638.E8C4C1407BD71@svoboda.polytechnique.org>
From: Ted Dunning <ted.dunning@gmail.com>
Date: Thu, 7 Jul 2011 22:16:00 -0700
Message-ID: 
 <CAJwFCa0kenQ9LK7MUqyTrES-oZMgv4xn04-GwnwPhBGiEMECtg@mail.gmail.com>
Subject: Re: [math] Equivalent of Blas DAXPY
To: Commons Developers List <dev@commons.apache.org>
Content-Type: multipart/alternative; boundary=20cf3068449110676204a787eff6

--20cf3068449110676204a787eff6
Content-Type: text/plain; charset=UTF-8

AbstractMatrix

On Thu, Jul 7, 2011 at 8:06 PM, Sebastien Brisard <sebastien.brisard@m4x.org
> wrote:

> Ted,
> Mahout seems to be fairly large (!). What classes should I look at more
> specifically?
> Thanks!
> Sebastien
>
> >The Colt package used a functional style to implement what you suggest.
> > This approach has been inherited by Mahout.
>
> > The basic idea is that there is an assign method that takes other
> arguments
> > and a function for combining the arguments.  The function allows great
> > amounts of flexibility and promotes compositional style.  A small amount
> of
> > special case code for common operations and the JVM's very impressive
> > ability to in-line code result in pretty fast operations.
>
> > The problem with this kind of approach is that users have a very hard
> time
> > understanding how to write code (where is the plus method, they say.
>  where
> > is the element-wise max of two vectors?)
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscribe@commons.apache.org
> For additional commands, e-mail: dev-help@commons.apache.org
>
>

--20cf3068449110676204a787eff6--