Mailing-List: contact user-help@couchdb.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@couchdb.apache.org
Received-SPF: pass (nike.apache.org: domain of jchris@gmail.com designates
 209.85.160.56 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:sender:in-reply-to:references:date
         :x-google-sender-auth:message-id:subject:from:to:content-type
         :content-transfer-encoding;
        b=mkBaGn7aMSD/bXJb9sB0+ltrI4QBvmn6rbTLLp6ZgQpsSYMYSXhzlgUzF3Yv7TAIfu
         PlJoK9JPgLUq+s7FZpFg5cfVe+38ZggABvcDMSx8Qpmw3yfbcxzVhcnPTRNR7ENNp1LP
         hBRc3Cj/gVS7mY+qTmMJ6D4AB3Ow55B2Jtrmg=
MIME-Version: 1.0
Sender: jchris@gmail.com
In-Reply-To: <1bca98390912081311ve2108edg129ee1a6cfda5e09@mail.gmail.com>
References: <1bca98390912081250u74b3e33cu305e6689d797b6@mail.gmail.com>
	 <20091208220338.21056yf7vhemjrcg@webmail.df.eu>
	 <1bca98390912081311ve2108edg129ee1a6cfda5e09@mail.gmail.com>
Date: Thu, 10 Dec 2009 11:44:31 -0800
Message-ID: <e282921e0912101144g58b49c7fx51f2d40871a11735@mail.gmail.com>
Subject: Re: scaling dimensions in reduce
From: Chris Anderson <jchris@apache.org>
To: user@couchdb.apache.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

On Tue, Dec 8, 2009 at 1:11 PM, Matteo Caprari <matteo.caprari@gmail.com> w=
rote:
> Hi Kosta.
>
> I'm trying to output an svg chart using a _list function, so no client
> is consuming the view directly.
>
> I could find the max and scale the data inside the list, but that
> would consume quite a lot of memory for big datasets,
> unless it was possibe to reset the iterator...
>

There are a few use cases which could benefit from the ability to
specify an array of view queries in the POST body. By querying the
reduce, and then the non-reduce, you could do this in a list. But
first we need that feature. It would look like a more generalized form
of this:

http://issues.apache.org/jira/browse/COUCHDB-523

> -teo
>
> On Tue, Dec 8, 2009 at 9:03 PM, =A0<kosta@fillibach.de> wrote:
>> Hi!
>>
>>> To scale the values I'need to know the maximum point, =A0and I think
>>> it'not possible to do that with map/reduce.
>>
>> You can find the maximum point using map/reduce. The division of all poi=
nt
>> must then be done manually given that point, e.g. in a view. Of course,
>> doing it this way has problems with atomicity.
>>
>> HTH,
>> Kosta
>>
>>
>>
>
>
>
> --
> :Matteo Caprari
> matteo.caprari@gmail.com
>


--=20
Chris Anderson
http://jchrisa.net
http://couch.io