help with storing i,j loop results?

Question

arkedia 2014-12-21

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https://ww2.mathworks.cn/matlabcentral/answers/167466-help-with-storing-i-j-loop-results

回答： Stephen23 2014-12-21

the following code,i use it to calculate a statistic. note:the statistic is (AIC) used in regression rand time series identification the first for loop i stored all result as

A 1  2  3  4 5
B 12 17 6 13 8

not A is ind and B is aic result BUT the second for loop i don't know how to get results as i did in the previous loop

i want store all the loop results taking in account that the ind (index) in second loop is (i,j)

    for i=1:5
        a=i;
        ind=[a]
        one=x(:,[i])
        [b_LS, sigma_b_LS, s_LS] = lscov(one,y)
        s = s_LS
        aicx1=size(one,1)*log(s)+2*size(one,2)
        A(i)=vertcat(ind)
        B(i)=vertcat(aicx1)
    end
    aic1=[A;B]
    m=[]
    for i=1:4
        for j=2:5
            if i<j
                a=i;
                b=j;
                ind=[a,b]
                two=x(:,[i,j])
                [b_LS, sigma_b_LS, s_LS] = lscov(two,y)
                s = s_LS
                aicx2=size(two,1)*log(s)+2*size(two,2)
            end
        end
    end

what can i do? Thanks

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Stephen23 2014-12-21

Do not use i or j for your loop variables, as these are the names of the inbuilt imaginary unit . Shadowing the standard functions and variables like this is usually a bad idea.

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