##### 22.6.2.34 spkron

— Function File: spkron (a, b)

> Form the kronecker product of two sparse matrices. This is defined block by block as

>               x = [a(i, j) b]

> For example,

>               kron(speye(3),spdiag([1,2,3]))
>               =>
>               Compressed Column Sparse (rows = 9, cols = 9, nnz = 9)

>                 (1, 1) ->  1
>                 (2, 2) ->  2
>                 (3, 3) ->  3
>                 (4, 4) ->  1
>                 (5, 5) ->  2
>                 (6, 6) ->  3
>                 (7, 7) ->  1
>                 (8, 8) ->  2
>                 (9, 9) ->  3