MATLAB: How can i add column in matrix

matrix

A is a matrix:

0 9 8 4 6

9 0 8 4 3

0 6 4 8 9

8 0 4 6 9

9 0 8 4 3

0 9 4 8 6

9 0 8 4 6

how to add another column at the end of matrix A?

Depends what you want in that column but you could for example add a column of zeros as follows:

A = [A zeros(size(A,1),1)]

new_A=zeros(size(B));
new_A(2:end,2:end)=A;

y = [1 2 5 3 5 7 2 6 4];
x = [1 -2 7 3 5 4 2 -6 2];
z = sum(reshape((x-y).^2,3,[]));