Get a new matrix from another matrix through loop

Dear all,

I want to obtain matrix D_GW from D_AQ where:

D_GW = [a b c; d e f];
D_AQ = [(b-a) (c-b); (e-d) (f-e)];

To do this, I have set the initial column of D_GW as 0 and simply add D_AQ but I keep getting the error "Index in position 1 exceeds array bounds (must not exceed 1)". Any help is greatly appreciated. Thank you.

D_GW    = [];    
D_GW(:,1) = 0;     

D_AQ   = [2 3; 5 6];  % D_GW = [0 2 5; 0 5 11]

for row = 1:size(D_AQ,1)
    for col = 1:size(D_AQ,2)
        D_GW(row,col+1) = D_GW(row,col) + D_AQ(row,col); 
    end
end

Answer 1

[KSSV]

D_GW    = zeros(2,3);    
D_GW(:,1) = 0;     

D_AQ   = [2 3; 5 6];  % D_GW = [0 2 5; 0 5 11]

for row = 1:size(D_AQ,1)
    for col = 1:size(D_AQ,2)
        D_GW(row,col+1) = D_GW(row,col) + D_AQ(row,col); 
    end
end