ground/gcs/src/libs/eigen/doc/snippets/Tridiagonalization_compute.cpp

   1 Tridiagonalization<MatrixXf> tri;
   2 MatrixXf X = MatrixXf::Random(4,4);
   3 MatrixXf A = X + X.transpose();
   4 tri.compute(A);
   5 cout << "The matrix T in the tridiagonal decomposition of A is: " << endl;
   6 cout << tri.matrixT() << endl;
   7 tri.compute(2*A); // re-use tri to compute eigenvalues of 2A
   8 cout << "The matrix T in the tridiagonal decomposition of 2A is: " << endl;
   9 cout << tri.matrixT() << endl;