From: "baptiste Auguié" <ba208@...>
Date: 2007-07-01T20:25:04+09:00
Subject: Re: simple math operations on arrays

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yep, i do want (-2/3). Oh, i see, is 2/3 =3D=3D 1 for Ruby?? OMG this is =
=20
mad !

thanks, it works now!

<code>
radius=3D0.045
aspectRatio=3D[]
longAxis=3D[]
shortAxis=3D[]

0.5.step(1, 0.1) { |x| aspectRatio << x.to_s }

longAxis=3DaspectRatio.collect{ |x|  radius*((x.to_f)**(-2/3.to_f)) }
aspectRatio.each_index { |x| shortAxis << longAxis[x].to_f*aspectRatio=20=

[x].to_f}
puts longAxis
puts shortAxis

</code>

any easier / more elegant way to do all this ?


thanks,

baptiste

On 1 Jul 2007, at 12:15, Robert Dober wrote:

> On 7/1/07, baptiste Augui=E9 <ba208@exeter.ac.uk> wrote:
>>
>>
>> The names may have been confusing without the context. I believe the
>> formula is right (as Octave's results show).
> You mean **(-2/3) is what you want????
> Maybe I was not clear enough - as I rarely are :(.
> -2/3 =3D=3D> -1
>
> Robert
>

_____________________________

Baptiste Augui=E9

Physics Department
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK

Phone: +44 1392 264187

http://newton.ex.ac.uk/research/emag
http://projects.ex.ac.uk/atto
______________________________






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