Matrix with two diagonals: Difference between revisions
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Not a robot (talk | contribs) (Add CLU) |
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0 1 0 1 0 |
0 1 0 1 0 |
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1 0 0 0 1 |
1 0 0 0 1 |
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</lang> |
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=== Sparse matrix version === |
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<lang julia>julia> using LinearAlgebra |
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julia> twodiagonalsparse(n) = I(n) .| rotl90(I(n)) |
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twodiagonalsparse (generic function with 1 method) |
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julia> twodiagonalsparse(7) |
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7×7 SparseArrays.SparseMatrixCSC{Bool, Int64} with 13 stored entries: |
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1 ⋅ ⋅ ⋅ ⋅ ⋅ 1 |
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⋅ 1 ⋅ ⋅ ⋅ 1 ⋅ |
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⋅ ⋅ 1 ⋅ 1 ⋅ ⋅ |
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⋅ ⋅ ⋅ 1 ⋅ ⋅ ⋅ |
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⋅ ⋅ 1 ⋅ 1 ⋅ ⋅ |
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⋅ 1 ⋅ ⋅ ⋅ 1 ⋅ |
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1 ⋅ ⋅ ⋅ ⋅ ⋅ 1 |
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julia> twodiagonalsparse(8) |
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8×8 SparseArrays.SparseMatrixCSC{Bool, Int64} with 16 stored entries: |
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1 ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ 1 |
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⋅ 1 ⋅ ⋅ ⋅ ⋅ 1 ⋅ |
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⋅ ⋅ 1 ⋅ ⋅ 1 ⋅ ⋅ |
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⋅ ⋅ ⋅ 1 1 ⋅ ⋅ ⋅ |
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⋅ ⋅ ⋅ 1 1 ⋅ ⋅ ⋅ |
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⋅ ⋅ 1 ⋅ ⋅ 1 ⋅ ⋅ |
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⋅ 1 ⋅ ⋅ ⋅ ⋅ 1 ⋅ |
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1 ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ 1 |
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</lang> |
</lang> |
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