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Give me structure please
if whole matrix not 0, it will be iterated again
or if whole matrix 0 stop
how can i iterate it
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You can use while as follows
while any(A) end
any(A) assumes first that all values of A can be converted to type logical. This conversion turns any number different from zero into 1. Then, if there is any element of A that is 1, then any(A)=1 and the iteration continues.
Is this what you want?