From: ptkwt@...1.aracnet.com (Phil Tomson)
Date: 2002-12-01T14:41:40+09:00
Subject: Re: Numerical Ruby

In article <20021201001712.48f6cb67.Olivier.Saut@gmm.insa-tlse.fr>,
Olivier Saut  <Olivier.Saut@gmm.insa-tlse.fr> wrote:
>Hi all,
>
>I am now using Ruby to test my numerical schemes. Using Ruby for this
>task was a real pleasure (I usually code in F90). The computations run
>just fine but I would like to have a result a little faster.
>
>My code uses lots of loops as in the following example. 
>
>def faraday
>for y in 1..(maxY-1)
> for z in 1..(maxZ-1)   
>  @Bx[y,z]+=-(dt/dy)*(@Ez[y+1,z]-@Ez[y,z])+(dt/dz)*(@Ey[y,z+1]-@Ey[y,z])
>  @By[y,z]+=  - (dt/dz)*(@Ex[y,z+1]-@Ex[y,z])        
>  @Bz[y,z]+=(dt/dy)*(@Ex[y+1,z]-@Ex[y,z])      
>  end
> end
>end
>
>I am using NArray from Masahiro Tanaka
>(http://www.ir.isas.ac.jp/~masa/ruby/index-e.html) to represent the
>electromagnetic field.
>
>Is there any way to speed up this type of computations? (I am not sure
>how a C extension could help in this case.)
>
>BTW, is there any trend to develop the use of Ruby in the field of
>scientific computations (as it seems to be the case with Python)? 

There should be.  Actually, there are a few folks out there that seems to 
be using Ruby in scientific computation.

Phil
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