Closest I know of is https://github.com/tanmaykm/ChainedVectors.jl

--Tim

On Friday, July 03, 2015 01:06:31 PM Tom Breloff wrote:
> I'm interested in being able to do zero-copy concatenation of
> AbstractArrays, with something similar to ArrayViews, but in reverse:
> 
> x = rand(4,2)
> y = rand(4,2)
> z = hcatview(x,y)  # "view" that is able to index into hcat(x,y) without
> creating the temporary matrix
> x[1,1] = 10.0
> @assert z[1,1] == x[1,1]
> 
> Does this exist already somewhere?  If I was to build it, should I submit a
> PR to somewhere (ArrayViews?) or start a new package?
> 
> One of many uses is to generate a large block matrix, potentially composed
> of both dense and sparse matrices.  Bonus points if I can get a
> ContiguousView when "view(z, 1:3, 4:5)" refers to a range that is totally
> encapsulated by a dense child matrix.

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