Any function to get corresponding eigenvector from a eigenvalue in eigen ?

If you computed the eigenvalues using Eigen, then the ordering of eigenvalues and eigenvectors is consistent: the first eigenvector corresponds to the first eigenvalue, etc. Have a look at the example at http://eigen.tuxfamily.org/dox/classEig ... 5dcad2a31b .

If you got the eigenvalues in some other way, then there is no function in Eigen yet to compute the corresponding eigenvalue. Rayleigh quotient iteration may be helpful in this case.

jitseniesen wrote:If you computed the eigenvalues using Eigen, then the ordering of eigenvalues and eigenvectors is consistent: the first eigenvector corresponds to the first eigenvalue, etc. Have a look at the example at http://eigen.tuxfamily.org/dox/classEig ... 5dcad2a31b .

If you got the eigenvalues in some other way, then there is no function in Eigen yet to compute the corresponding eigenvalue. Rayleigh quotient iteration may be helpful in this case.

oh,thank you !