A block sparse array type in Julia based on the BlockArrays.jl interface.
BlockSparseArrays.jl is supported by the Flatiron Institute, a division of the Simons Foundation.
This package resides in the ITensor/ITensorRegistry local registry.
In order to install, simply add that registry through your package manager.
This step is only required once.
julia> using Pkg: Pkg julia> Pkg.Registry.add(url = "https://github.com/ITensor/ITensorRegistry")
or:
julia> Pkg.Registry.add(url = "[email protected]:ITensor/ITensorRegistry.git")
if you want to use SSH credentials, which can make it so you don't have to enter your Github ursername and password when registering packages.
Then, the package can be added as usual through the package manager:
julia> Pkg.add("BlockSparseArrays")
using BlockArrays: Block using BlockSparseArrays: BlockSparseArray, blockstoredlength using Test: @test a = BlockSparseArray{Float64}(undef, [2, 3], [2, 3]) a[Block(1, 2)] = randn(2, 3) a[Block(2, 1)] = randn(3, 2) @test blockstoredlength(a) == 2 b = a .+ 2 .* a' @test Array(b) ≈ Array(a) + 2 * Array(a') @test blockstoredlength(b) == 2
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