MATLAB: Please help with For Loop

for loop

    u1 = v(:,1);
    a2 = v(:,1)\v(:,2);
    u2 = v(:,2) - v(:,1)*a2;
    a3 = v(:,[1 2])\v(:,3);
    u3 = v(:,3) - v(:,[1 2])*a3;
    a4 = v(:,[1 2 3])\v(:,4);
    u4 = v(:,4) - v(:,[1 2 3])*a4;
    % Structural residuals   and covariance 
    b02 = [ 1           0        0        0;
           -a2(1)       1        0        0;
           -a3(1)    -a3(2)      1        0;
           -a4(1)    -a4(2)    -a4(3)     1 ];
    u  = [u1 u2 u3 u4 ];
Please advise how can I estimate a , u and b with for loop…in case I have many more variables then just four.

Best Answer

Index your variables instead of using fixed variable name. Use cell arrays.
a{K} = v(:,K-1)\v(:,K);
u{K} = v(:,K) - v(:,K-1)*a{K};
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