From: Axel Etzold <AEtzold@...>
Date: 2007-07-04T23:03:50+09:00
Subject: Re: simple question on rbgsl vectors

Dear Baptiste,

you can get reference for the gsl bindings for ruby
here:

http://rb-gsl.rubyforge.org/ref.html .


> oldVector.get(3,4,5) returns the first 3 elements, where I would  
> expect the 2nd, 3d and 4th.

oldVector.get([3,4,5])  worked for me - I'm not quite sure
why this:

> oldVector.get(3,4,5) returns the first 3 elements

happens...


> 
> I've had to do a twisted version of this using arrays and lists,
> 
> a2=[]
> (0..200).step(10) {|i|  a2 << a[i] }
> 
> I find it very inefficient and annoying, plus I do need to use  
> vectors rather than arrays and lists and do not really know how to  
> convert between these three :(

You'll find info about that on the website given above.


> 
> 
> Oh, and just a quick question: how can i do two instructions in one  
> block ? I have to repeat the same instructions over and over like  
> shown below...

You can use the same index several times:

 (0..200).step(10) {|i|  a2 << a[i] ; b2<<b[i] }

Best regards,

Axel 

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