A = [1 2 3 4;
     4 3 2 1;
     3 1 4 2;
     2 3 4 1];

x = A.*A;

normalize(A);

normalize(inv(A));
norm(A);
norm(inv(A));

B = {1 2 4};
C = {4 3 5};

y = -1:0.2:1;

z = 1:1:3;

M = repmat(z, [5 1])
M = reshape(M, [size(M) 1])