% EX4_4.M  Check results of Example 4.4%  Uses command eig to find eigenvalues and eigenvectorsformat rat       % Rational fractionsR=[2 1;1 2]      % Define resistance matrixG=inv(R)         % Find conductivity matrix[V,D]=eig(G)     % Determine eigenvectors (V) and%                    eigenvalues (diag(D))fprintf('Eigenvectors are columns of V- normalized')%