Tridiagonalization_packedMatrix.cpp revision c981c48f5bc9aefeffc0bcb0cc3934c2fae179dd 
1Matrix4d X = Matrix4d::Random(4,4);
2Matrix4d A = X + X.transpose();
3cout << "Here is a random symmetric 4x4 matrix:" << endl << A << endl;
4Tridiagonalization<Matrix4d> triOfA(A);
5Matrix4d pm = triOfA.packedMatrix();
6cout << "The packed matrix M is:" << endl << pm << endl;
7cout << "The diagonal and subdiagonal corresponds to the matrix T, which is:"
8     << endl << triOfA.matrixT() << endl;
9