how to do the matrix value comparison of two different iterations ?

Question

Akash Pal 2022-6-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1745510-how-to-do-the-matrix-value-comparison-of-two-different-iterations

评论： Akash Pal 2022-11-4

采纳的回答： Karim

fun [ …… …. ]= mainfun [………………….]

iteration=1

while iteration<maxiterationno

some parameter and their calculation

[ ]=subfun1 [];

[ ,out2 ]=subfun2[];

Newoutput=out2(1:10,:)

Iteration=iteration+1;

end

maybe from subfun2 I will get one output called out2 ,I want to do the comparison of iteration number i and iteration i+1 ,if iteration i+1 give me better solution like the summation of any specific column value is greater than the ith iteration then my iteration should be stop and it will show me the best solution value .

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Answer 1

Karim 2022-6-22

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https://ww2.mathworks.cn/matlabcentral/answers/1745510-how-to-do-the-matrix-value-comparison-of-two-different-iterations#answer_990710

在 MATLAB Online 中打开

yes, you can do this like you say by saving the best result and updating it at each iteration

i tried to update the pseudo code to give you the idea

function [] = mainfun()
iteration = 0;
old_out2 = 0;
c = 2; % column to check
while iteration < max_iteration
    
    % increase the counter
    iteration = iteration + 1;
    
    % some parameter and their calculation
    [] = subfun1();
    [, out2] = subfun2();
    
    if iteration == 1
        % at the first iteration save the result
        old_out2 = out2;
    else
        % for all other iterations, check if the new result is bigger
        if sum( old_out2(:,c) ) < sum( out2(:,c) )
            % if so break the loop
            break
        end
    end
end

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Akash Pal 2022-6-23

Thank You I understand .

Akash Pal 2022-11-4

I have a question ,maybe after certain iteration number i got my expected result but if i want to do another 3 to 5 iteration more and if i get everytime better solution then i want to stop the iteration .Then how to implement inside the code ?

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