Re: [ublas] RogueWave "pick" -> equivalent in ublas?

From: Nico Galoppo (nico_at_[hidden])
Date: 2007-03-21 16:10:06

While I don't have personal experience with this, I've seen this discussed 
recently. You can search the mailing list archives for

indirect_array
matrix_indirect
vector_indirect

Cheers,

--nico

Gross, Steve wrote:
> In RogueWave, there’s a “pick” operation where, given a vector and a 
> list of indices, roguewave gives you a proxy to that vector. The proxy’s 
> elements are indexed back on that given list of indices. For instance:
> 
>  
> 
> V = { 1, 3, 5, 7, 6, 4, 2, 0 }
> 
> W = pick(V, 0, 2, 1, 5) = { 1, 5, 3, 4 }
> 
>  
> 
> In the above example, W is a proxy vector to V, and it points to (in 
> order) the 0^th , 2^nd , 1^st , and 5^th element of V.
> 
>  
> 
> Is there an equivalent feature in ublas?
> 
>  
> 
> Thanks,
> 
> --Steve
> 
> 
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-- 
nico galoppo von borries     |  address: 119 fidelity st., carrboro
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