returns the number of eigenvalues/eigenvectors . this is the matrix 's dimension . concode_field_sep DenseMatrix64F mat concode_elem_sep EigenDecomposition<DenseMatrix64F> eig concode_field_sep Complex64F getEigenvalue concode_elem_sep T getEigenVector concode_elem_sep EigenDecomposition getEVD concode_elem_sep int getIndexMax concode_elem_sep int getIndexMin concode_elem_sep double quality