how to control that every element of an arrows is >0? in matlab

You can use logical indexing in MATLAB to check whether every element in an array is greater than 0. Here is an example to illustrate this:

main.m
% Create an example array
arrows = [1, 2, 3, 4, 5];

% Check if every element is greater than 0
check_result = all(arrows > 0);

if check_result
    disp('Every element in arrows is greater than 0');
else
    disp('Not every element in arrows is greater than 0');
end
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In this code snippet, the all() function is used along with logical indexing to verify if every element in the arrows array is greater than 0. If it returns true, then every element in the array satisfies the condition, otherwise not.