Updating for loop boundaries in MATLAB

Hey, I have a for loop inside of that loop, there is a for loop whose upper boundary is row length of a matrix A, inside this loop I am reaching and deleting rows of A within some condition. The problem is, as far as I have reduced row length of A, my for loop stops because its boundary exceeds the reduced row length of A. In first for loop, I am performing some expressions to updating my A matrix meaning that, I made rows of A deletable within the condition that I referred. My second for loop's boundary should be updated in every deleting operation to be able to delete itself in second loop, enventually. How can I solve this problem? The structure of my code is more or less like below:

for c = 1:10 
    ; %statements mading rows of A deletable
    for i = 1:size(A,1)
        if %conditions
            A(i,:) = []; %deleting rows of A, so its row length reduced
        else
            ;   %do nothing
        end
    end
end

Answer 1

[Matt J]

for i = 1:size(A,1)

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Yeah, don't be confused by that, I corrected, the problem stands still. Thanks, cheers!

[Matt J]

It's usually more efficient, and less bug-prone, to delete the rows after the loop. Just use the loop to form a list of the rows that you want deleted later:

    discard=false(size(A,1),1);
    
    for i = 1:size(A,1)
        if %conditions
            discard(i)=true; 
        end
    end
    
    A(discard,:)=[];

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Thanks, may you say some words about the logic behind this false operation?

[Matt J]

Using false() reflects the assumption that no rows will be deleted, until it is established in the loop that a delete condition for certain rows is satisfied. But you could have done it in other ways, e.g.,

    keep=true(size(A,1),1); %assume all rows will be kept (not deleted)
    
    for i = 1:size(A,1)
        if %conditions
            keep(i)=false; 
        end
    end
    
    A=A(keep,:);

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Thank you!