MATLAB: Get a new matrix from another matrix through loop

for loopMATLABmatricesmatrix

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

Best Answer

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
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