diff options
Diffstat (limited to 'doc/snippets/Tridiagonalization_Tridiagonalization_MatrixType.cpp')
| -rw-r--r-- | doc/snippets/Tridiagonalization_Tridiagonalization_MatrixType.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/doc/snippets/Tridiagonalization_Tridiagonalization_MatrixType.cpp b/doc/snippets/Tridiagonalization_Tridiagonalization_MatrixType.cpp new file mode 100644 index 000000000..109650041 --- /dev/null +++ b/doc/snippets/Tridiagonalization_Tridiagonalization_MatrixType.cpp @@ -0,0 +1,11 @@ +MatrixXd X = MatrixXd::Random(5,5); +MatrixXd A = X + X.transpose(); +cout << "Here is a random symmetric 5x5 matrix:" << endl << A << endl << endl; + +Tridiagonalization<MatrixXd> triOfA(A); +cout << "The orthogonal matrix Q is:" << endl << triOfA.matrixQ() << endl; +cout << "The tridiagonal matrix T is:" << endl << triOfA.matrixT() << endl << endl; + +MatrixXd Q = triOfA.matrixQ(); +MatrixXd T = triOfA.matrixT(); +cout << "Q * T * Q^T = " << endl << Q * T * Q.transpose() << endl; |