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    %% Least-Squares on an Underdetermined System  
% Solve an underdetermined system, |x*C = D|.   

%%  
C = [1 0; 2 0; 1 0];
D = [1 2];
x = D/C 

%%
% MATLAB(R) issues a warning but proceeds with calculation.  

%% 
% Verify that |x| is not an exact solution. 
x*C-D