Can someone help me write a code to generate a random matrix like the one in the picture?

Answer 1

[Ameer Hamza]

See blkdiag(): https://www.mathworks.com/help/matlab/ref/blkdiag.html. It is made specifically for this purpose. For example

d = 3;
N = 3;

C = cell(N, 1);
for i=1:N
    C{i} = rand(d);
end

M = blkdiag(C{:});

Result

>> M
M =
    0.9106    0.1455    0.5797         0         0         0         0         0         0
    0.1818    0.1361    0.5499         0         0         0         0         0         0
    0.2638    0.8693    0.1450         0         0         0         0         0         0
         0         0         0    0.8530    0.5132    0.2399         0         0         0
         0         0         0    0.6221    0.4018    0.1233         0         0         0
         0         0         0    0.3510    0.0760    0.1839         0         0         0
         0         0         0         0         0         0    0.2400    0.9027    0.4893
         0         0         0         0         0         0    0.4173    0.9448    0.3377
         0         0         0         0         0         0    0.0497    0.4909    0.9001

[Abdul Wasay Khatri]

Thank you so much

[Ameer Hamza]

I am glad to be of help!