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%% Test Nonsquare Matrix %% % Create a 3-by-5 matrix. A = [1 0 0 0 0; 2 1 0 0 0; 3 2 1 0 0] %% % Test if |A| has nonzero elements above the main diagonal. isbanded(A,2,0) %% % The result is logical |1| (|true|) because the elements above the main % diagonal are all zero.