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

   1 MatrixXd X = MatrixXd::Random(4,4);
   2 MatrixXd A = X * X.transpose();
   3 cout << "Here is a random positive-definite matrix, A:" << endl << A << endl << endl;
   4
   5 SelfAdjointEigenSolver<MatrixXd> es(A);
   6 cout << "The inverse square root of A is: " << endl;
   7 cout << es.operatorInverseSqrt() << endl;
   8 cout << "We can also compute it with operatorSqrt() and inverse(). That yields: " << endl;
   9 cout << es.operatorSqrt().inverse() << endl;