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    %% Product of Elements in Each Column  

%% 
% Create a 3-by-3 array whose elements correspond to their linear indices. 
A=[1:3:7;2:3:8;3:3:9]  

%% 
% Find the product of the elements in each column. The length of the first
% dimension is 1, and the length of the second dimension matches
% |size(A,2)|.
B = prod(A)