sparse matrix diagonalisation all eigenvalue and eigenvector

I want to know all eigenvalue and eigen vecto But,eigs is not all eigenvalue and eigenvaluevector

Answer 1

[KSSV]

use eig....

[yuta yabe]

eig not use sparse matrix...

[KSSV]

Have you tried? Though it is a sparse matrix eig will work, eig will give you all eigen values.