kron - Kronecker product (.*.)
kron(A,B) or A.*.B returns the Kronecker tensor product of two matrices A and B . The resulting matrix has the following block form:
| A(1,1) B ..... A(1,n) B | | . . | A .*. B = | . . | | . . | | A(m,1) B ..... A(m,n) B |
If A is a m x n matrix and B a p x q matrix then A.*.B is a (m*p) x (n*q) matrix.
A and B can be sparse matrices.
A=[1,2;3,4]; kron(A,A) A.*.A sparse(A).*.sparse(A) A(1,1)=%i; kron(A,A)