Doing while and for loop together

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Atik Faysal 2020-4-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/518833-doing-while-and-for-loop-together

评论： Atik Faysal 2020-4-18

sum_Train={};
sum=0;
for j=1:10
    while j <= 10
    for i=1:10
    sum_Train{j,1} = sum+results{j,1}(i,i);
    end
    end
end

here, result is a 10*1 cell. for each value of j, i shoild go from 1 to 10. When i is 10, the value of j should be incremented by 1 and i should start from 0 again. The result is stored in sum_Train which is 10*1 cell.

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Tommy 2020-4-18

在 MATLAB Online 中打开

If you run the following code, you'll see that you have created an infinite loop, as j never increases inside the while loop.

for j=1:10
    while j <= 10
        for i=1:10
            disp([i j])
        end
    end
end

I don't see the need for a while loop. The following should do what you described:

sum_Train={};
sum=0;
for j=1:10
    for i=1:10
        sum_Train{j,1} = sum+results{j,1}(i,i);
    end
end

Atik Faysal 2020-4-18

在 MATLAB Online 中打开

Thank you. I just solved it. Just leaving it here.

sum_Train={};
sum=0;
for j=1:length(results_Train)
    while j <= length(results_Train)
    for i=1:length(results_Train) 
    sum = sum+results_Train{j,1}(i,i);
    end
    sum_Train{j,1}=sum;
    j=j+1;
    sum=0;
    end
end