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From Matteo Caprari <matteo.capr...@gmail.com>
Subject Re: scaling dimensions in reduce
Date Thu, 10 Dec 2009 19:53:31 GMT
Interesting.

Let's say I'd like to implement that feature. Where would you start?
Is there a document like "start hacking couchdb"?

-teo

On Thu, Dec 10, 2009 at 7:44 PM, Chris Anderson <jchris@apache.org> wrote:
> On Tue, Dec 8, 2009 at 1:11 PM, Matteo Caprari <matteo.caprari@gmail.com> wrote:
>> 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,  <kosta@fillibach.de> wrote:
>>> Hi!
>>>
>>>> To scale the values I'need to know the maximum point,  and I think
>>>> it'not possible to do that with map/reduce.
>>>
>>> You can find the maximum point using map/reduce. The division of all point
>>> 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
>>
>
>
>
> --
> Chris Anderson
> http://jchrisa.net
> http://couch.io
>



-- 
:Matteo Caprari
matteo.caprari@gmail.com

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