MATLAB: I have make a code for block Kronecker product when both A and B have even dimension now thequestion (I want to make a code when A and B have are not even and also A is square and B is rectangular and vice versa)

block kronecker product

function y=Kronb4(A,B) %n is the order of the matrix R y=[kron(A,B(1:2,1:2)) kron(A,B(1:2,3:4)) ; kron(A,B(3:4,1:2)) kron(A,B(3:4,3:4))] ;

Best Answer

I'm not sure how to do this, but take a look at the implementation of kron in MATLAB:

 edit kron.m

You'll see that it uses reshape and multiplication with implicit expansion to compute kron. Possibly, you can also get the block Kronecker product if you reshape the matrices in a different way?

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MATLAB: Odd and even numbers

You simply have to go back to the definition of odd and even. An (integer) number is even if it is divisible by 2, odd otherwise. Divisible by 2 means that the remainder when divided by 2 is 0. That is easy to test, the function to get the remainder is rem (or you can use mod).

As with many things in matlab you do not need a loop, the functions work on vector / matrices

m = [1 2 3;4 5 6]
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A = [1 2 4 3];
B = [2 3 1 4];
C = [4 2 3 1];
for i=1:4
	D(find(C == A(i))) = B(i);
end

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