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Date: Sat, 12 Jul 2008 01:31:08 +0800
From: "daniel kuan" <daniel.kuan@gmail.com>
To: "Commons Developers List" <dev@commons.apache.org>
Subject: Re: [math] Fast Hadamard Transform
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Hi Luc,

Thanks for the quick response. Issue MATH 215 has been created to track my
suggestion.

Regards,
Daniel

2008/7/11 <luc.maisonobe@free.fr>:

> Hi Daniel,
>
> Thanks for your suggestion. Could you open a JIRA issue with type "New
> feature" to register it ? The URL of our JIRA tracker is here:
> https://issues.apache.org/jira/browse/MATH
>
> You will have to register in order to be able to create a new issue.
>
> regards,
> Luc
>
> ----- Mail Original -----
> De: "daniel kuan" <daniel.kuan@gmail.com>
> =C0: dev@commons.apache.org
> Envoy=E9: Vendredi 11 Juillet 2008 12:23:43 GMT +01:00 Amsterdam / Berlin=
 /
> Berne / Rome / Stockholm / Vienne
> Objet: [math] Fast Hadamard Transform
>
> I would like to suggest an addition of the fast hadamard transform to the
> following package:
>
> org.apache.commons.math.transform
>
> The class would be called:
>
> FastHadamardTransformer
>
>
> *1. A concise description of the new feature/enhancement.*
>
> The new feature will implement the fast hadamard transform.
>
> *2. References to definitions and algorithms.*
>
> Definition of the hadamard transform:
> http://en.wikipedia.org/wiki/Hadamard_transform#Definition
>
> Unfortunately, Mathworld does not provide a very detailed definition.
> http://mathworld.wolfram.com/HadamardTransform.html
>
> An elegant algorithm for the fast hadamard transform can be found here:
> http://www.archive.chipcenter.com/dsp/DSP000517F1.html
>
> *3. Some indication of why the addition/enhancement is practically useful=
.*
>
> The hadamard transform has applications in signal processing and data
> compression.
>
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