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    %% Eigenvalues of Matrix  

%% 
% Use |gallery| to create a symmetric positive definite matrix. 
A = gallery('lehmer',4)  

%% 
% Calculate the eigenvalues of |A|. The result is a column vector. 
e = eig(A)  

%% 
% Alternatively, use |eigvalOption| to return the eigenvalues in a diagonal
% matrix. 
D = eig(A,'matrix')