Chapter 16, Problem 23ICA

Write a function named AddDiags that accepts two 3 × 3 matrices (A and B) as arguments. and returns a two-element vector s. The first element of s is the sum of the elements on the main diagonal of A, and the second element of s is the sum of the elements on the minor diagonal of B. You must calculate each term in s individually from terms in A and B—you may not use any built-in functions. The function is not expected to work properly for any other matrix dimensions. Use the following values to test the function:

A = [1 3 –4; –2 2 0;–3 6 5];

B = [–3 0 6;4 –1 –9;–5 0 7];

S = [8 0]