1 #include <unsupported/Eigen/MatrixFunctions> 2 #include <iostream> 3 4 using namespace Eigen; 5 main()6int main() 7 { 8 const double pi = std::acos(-1.0); 9 10 MatrixXd A(3,3); 11 A << 0, -pi/4, 0, 12 pi/4, 0, 0, 13 0, 0, 0; 14 std::cout << "The matrix A is:\n" << A << "\n\n"; 15 std::cout << "The matrix exponential of A is:\n" << A.exp() << "\n\n"; 16 } 17