I want to create a block matrix out of square matrices with the following structure
H = [A B C D;
B A B C;
C B A B;
D C B A]
Cleraly, if I was interested in only a 4x4 block, this would be enough. However, I'm interested in constructing such matrices out of a set of N square matrices A,B,C,D,E ... forming an N by N matrix of square matrices. Suppose I define
What is the code I need to construct the corresponding 5 by 5 block matrix?