I'm havig trouble on matrix B, I should get B = [7 10 13 11; 16 24 28 23; 28 40 44 35; 23 28 41 27]

but, I'm getting B =

13 13 13 23

16 24 28 20

28 40 44 32

0 38 41 27

A = [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16]

C = size(A)

M = C(1)

N = C(2)

% Step 1: Get elements of the first row of matrix B from matrix A:

B(1,1) = A(1,2) + A(2,1)

for j = 2:N-1

B(1:j) = A(1,j-1) + A(2,j) + A(1,j+1)

end

B(1,N) = A(1,N-1) + A(2,N)

% Step 2: Get elements of the middle rows of Matrix B from matrix A:

for i = 2:M-1

B(i,1) = A(i-1,1) + A(i,2) + A(i+1,1)

end

for j = 2:N-1

for i = 2:M-1

B(i,j) = A(i,j-1) + A(i-1,j) + A(i+1,j) + A(i,j+1)

end

end

for i = 2:M-1

B(i,N) = A(i,j-1) + A(i-1,j) + A(i+1,j)

end

% Step 3: Get elements of the last row of matrix B from matrix A:

B(1,N) = A(N-1,1) + A(N,2)

for j = 2:N-1

B(N,j) = A(N,j-1) + A(N-1,j) + A(N,j+1)

end

B(M,N) = A(M,N-1) + A(M-1,N)

disp(B)

## Best Answer