stress tensor diagonalization

Hello, I've got to obtain the eigenvectors of a stress tensor that is a 3x3 symmetric matrix. The tensor has this form: [sigmax,0,taurz;0,sigmay,0;taurz,0,sigmazz]; I was wandering if I should use eig() or eigs() to diagonalize to obtain the eigenvectors. Thank you very much for your help, cheers Alberto

Answer 1

[Walter Roberson]

eigs() is for sparse matrices, and never for extracting all of the eigenvectors (if you try, it will tell you to use eig() )