If you don't want to use eig
, you can solve the matrix equation like so:
V=zeros(size(A));
for i=1:length(A)
V(:,i)=null(A-eye(size(A))*D(i,i));
end
Question
I am writing my own function get eigen values and eigen vectors. I have used QR algorithm to extract eigen values. How do I get eigen vectors using diagonal eigen value matrix D and original matrix A?
Solution
If you don't want to use eig
, you can solve the matrix equation like so:
V=zeros(size(A));
for i=1:length(A)
V(:,i)=null(A-eye(size(A))*D(i,i));
end
OTHER TIPS
You don't need the eigenvalues in order to get the eigenvectors. Just use:
[V,D] = eig(A);