00001 Tridiagonalization<MatrixXf> tri; 00002 MatrixXf X = MatrixXf::Random(4,4); 00003 MatrixXf A = X + X.transpose(); 00004 tri.compute(A); 00005 cout << "The matrix T in the tridiagonal decomposition of A is: " << endl; 00006 cout << tri.matrixT() << endl; 00007 tri.compute(2*A); // re-use tri to compute eigenvalues of 2A 00008 cout << "The matrix T in the tridiagonal decomposition of 2A is: " << endl; 00009 cout << tri.matrixT() << endl;