int main(int, char**)
{
cout.precision(3);
MatrixXcd X = MatrixXcd::Random(4,4);
MatrixXcd A = X + X.adjoint();
cout << "Here is a random self-adjoint 4x4 matrix:" << endl << A << endl << endl;
Tridiagonalization<MatrixXcd> triOfA(A);
MatrixXd T = triOfA.matrixT();
cout << "The tridiagonal matrix T is:" << endl << T << endl << endl;
cout << "We can also extract the diagonals of T directly ..." << endl;
VectorXd diag = triOfA.diagonal();
cout << "The diagonal is:" << endl << diag << endl;
VectorXd subdiag = triOfA.subDiagonal();
cout << "The subdiagonal is:" << endl << subdiag << endl;
return 0;
}
MatrixXcd X = MatrixXcd::Random(4,4); MatrixXcd A = X + X.adjoint(); cout << "Here is a random self-adjoint 4x4 matrix:" << endl << A << endl << endl; Tridiagonalization<MatrixXcd> triOfA(A); MatrixXd T = triOfA.matrixT(); cout << "The tridiagonal matrix T is:" << endl << T << endl << endl; cout << "We can also extract the diagonals of T directly ..." << endl; VectorXd diag = triOfA.diagonal(); cout << "The diagonal is:" << endl << diag << endl; VectorXd subdiag = triOfA.subDiagonal(); cout << "The subdiagonal is:" << endl << subdiag << endl;