2 SelfAdjointEigenSolver<MatrixXd>
es(
ones);
3 cout <<
"The first eigenvector of the 3x3 matrix of ones is:"
4 << endl <<
es.eigenvectors().col(0) << endl;
SelfAdjointEigenSolver< MatrixXd > es(ones)
Matrix< double, Dynamic, Dynamic > MatrixXd
Dynamic×Dynamic matrix of type double.