minor bug there. crashes for vectors and return incorrect answers for some input, for example a_in=[0 1 1 1; 0 0 0 0], a_out=[1 1 0 1; 0 0 0 0] instead of a_correct=[1 0 1 1; 0 0 0 0]. Ned, could you extend the test suite to 'kill' this answer?
Done. Thanks for the comment!
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