Julia SparseArrays.permute用法及代码示例

permute(A::AbstractSparseMatrixCSC{Tv,Ti}, p::AbstractVector{<:Integer},
        q::AbstractVector{<:Integer}) where {Tv,Ti}

双边置换 A ，返回 PAQ ( A[p,q] )。 Column-permutation q 的长度必须与 A 的列数 ( length(q) == size(A, 2) ) 匹配。 Row-permutation p 的长度必须与 A 的行数 ( length(p) == size(A, 1) ) 匹配。

有关专家驱动程序和其他信息，请参阅 permute! 。

例子

julia> A = spdiagm(0 => [1, 2, 3, 4], 1 => [5, 6, 7])
4×4 SparseMatrixCSC{Int64, Int64} with 7 stored entries:
 1  5  ⋅  ⋅
 ⋅  2  6  ⋅
 ⋅  ⋅  3  7
 ⋅  ⋅  ⋅  4

julia> permute(A, [4, 3, 2, 1], [1, 2, 3, 4])
4×4 SparseMatrixCSC{Int64, Int64} with 7 stored entries:
 ⋅  ⋅  ⋅  4
 ⋅  ⋅  3  7
 ⋅  2  6  ⋅
 1  5  ⋅  ⋅

julia> permute(A, [1, 2, 3, 4], [4, 3, 2, 1])
4×4 SparseMatrixCSC{Int64, Int64} with 7 stored entries:
 ⋅  ⋅  5  1
 ⋅  6  2  ⋅
 7  3  ⋅  ⋅
 4  ⋅  ⋅  ⋅