| Jitse Niesen | afed0ef | 2010-05-01 17:52:16 +0100 | [diff] [blame] | 1 | MatrixXcd X = MatrixXcd::Random(4,4); |
| 2 | MatrixXcd A = X + X.adjoint(); |
| 3 | cout << "Here is a random self-adjoint 4x4 matrix:" << endl << A << endl << endl; |
| 4 | |
| 5 | Tridiagonalization<MatrixXcd> triOfA(A); |
| Jitse Niesen | 4a5ebcd | 2010-12-12 13:53:42 +0000 | [diff] [blame] | 6 | MatrixXd T = triOfA.matrixT(); |
| Benoit Jacob | 26c2afd | 2010-12-30 04:52:20 -0500 | [diff] [blame] | 7 | cout << "The tridiagonal matrix T is:" << endl << T << endl << endl; |
| Jitse Niesen | afed0ef | 2010-05-01 17:52:16 +0100 | [diff] [blame] | 8 | |
| 9 | cout << "We can also extract the diagonals of T directly ..." << endl; |
| 10 | VectorXd diag = triOfA.diagonal(); |
| 11 | cout << "The diagonal is:" << endl << diag << endl; |
| 12 | VectorXd subdiag = triOfA.subDiagonal(); |
| 13 | cout << "The subdiagonal is:" << endl << subdiag << endl; |