Comments (3)
Yes!
julia> mortar(Diagonal([randn(2,2),randn(2,2)]))
2×2-blocked 4×4 BlockArray{Float64,2,Diagonal{Array{Float64,2},Array{Array{Float64,2},1}},Tuple{BlockedUnitRange{Array{Int64,1}},BlockedUnitRange{Array{Int64,1}}}}:
-2.31669 0.669511 │ ⋅ ⋅
-0.497779 0.407213 │ ⋅ ⋅
─────────────────────┼────────────────────
⋅ ⋅ │ -1.28362 2.24877
⋅ ⋅ │ -0.211033 1.58237
Note there is also BlockDiagonals.jl that is more specific to this use case. At some point it would be great to unify the interfaces.
from blockarrays.jl.
Thanks for the quick help!
I was searching block-diagonal in the docs and didn't find it.
Maybe something to think about adding.
from blockarrays.jl.
Yes indeed. These features are sometimes just a "free" by-product of the modularity in Julia, and sometimes are implemented with downstream packages in mind (e.g. BlockBandedMatrices.jl), so documentation is often incomplete, and features may not work without the downstream packages.
This means adding documentation is a lot harder than implementing features: there are many features that work without us even knowing about it!
A PR adding docs would be very appreciated.
from blockarrays.jl.
Related Issues (20)
- Err multiplying block array with `Diagonal`
- Broadcasting `BlockedUnitRange` sometimes loses blocking information HOT 2
- Generalize `BlockedUnitRange` to element types besides `Int` HOT 6
- Potential issue with `findblock[index]` for `BlockUnitRange` with `first != 1` HOT 4
- There and back again: a block indexing tale HOT 2
- Functionality for slicing with unit ranges that preserves block information HOT 8
- Slicing a `BlockIndexRange` with unit ranges doesn't return a `BlockedIndexRange`
- Indexing with `Vector{<:BlockIndexRange{1}}` HOT 2
- More convenient syntax for merging blocks
- Generic interface for constructing `AbstractBlockArray`s: `blocked(a::AbstractArray, blocklengths...)`
- `getindex(::UnitRange, ::BlockedUnitRange)` isn't blocked HOT 1
- More convenient syntax for getting the size of a block HOT 5
- Definition of BlockUnitRange HOT 3
- Overload dot HOT 3
- Bug: Block indexing changed between 0.16.40 and 0.16.43 HOT 1
- Failing to compile on 1.12 nightly HOT 7
- Rename PseudoBlockArray to BlockedArray (v1.0) HOT 1
- Make `blocks(randn(2, 2))[1, 1]` return the original array
- `mortar([Block(1)[1:2], Block(2)[1:2]])[Block(1)]` has type `Vector{BlockIndex{1}}` instead of `BlockIndexRange{1}`
- `+(::BlockVector, ::Vector)` promotes axis from `BlockedOneTo` to `BlockedUnitRange`
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from blockarrays.jl.