Use reshape to isolate elements of kron product

The kron product works like this:

How can I reshape this into an array C such that ?

Or more generally if I have how do I get Z such that ?

Answer 1

[Matt J]

You can use blkReshape from this FEX download

https://www.mathworks.com/matlabcentral/fileexchange/115340-block-transposition-permutation-and-reshaping-of-arrays?s_tid=srchtitle

Example:

B=ones(2);
A=[10 30;20 40];
C=kron(A,B)

C =

10 10 30 30

10 10 30 30

20 20 40 40

20 20 40 40

Cr=blkReshape(C,size(B),    [  ones(1,ndims(B)),    size(A)])

Cr(:,:,1,1) =

10 10

10 10

Cr(:,:,2,1) =

20 20

20 20

Cr(:,:,1,2) =

30 30

30 30

Cr(:,:,2,2) =

40 40

40 40