1*bf2c3715SXin Li MatrixXcf A = MatrixXcf::Random(4,4); 2*bf2c3715SXin Li HessenbergDecomposition<MatrixXcf> hd(4); 3*bf2c3715SXin Li hd.compute(A); 4*bf2c3715SXin Li cout << "The matrix H in the decomposition of A is:" << endl << hd.matrixH() << endl; 5*bf2c3715SXin Li hd.compute(2*A); // re-use hd to compute and store decomposition of 2A 6*bf2c3715SXin Li cout << "The matrix H in the decomposition of 2A is:" << endl << hd.matrixH() << endl; 7