www.gusucode.com > matlab 案例源码 matlab代码程序 > matlab/LeftEigenvectorsExample.m

    %% Left Eigenvectors  

%% 
% Create a 3-by-3 matrix. 
 A = [1 7 3; 2 9 12; 5 22 7];  

%% 
% Calculate the right eigenvectors, |V|, the eigenvalues, |D|, and the left
% eigenvectors, |W|. 
[V,D,W] = eig(A)  

%% 
% Verify that the results satisfy |W'*A = D*W'|. 
W'*A - D*W' 

%%
% Ideally, the eigenvalue decomposition satisfies the relationship. Since
% |eig| performs the decomposition using floating-point computations, then
% |W'*A| can, at best, approach |D*W'|. In other words, |W'*A - D*W'| is
% close to, but not exactly, |0|.