1RowVectorXd vec1(3); 2vec1 << 1, 2, 3; 3std::cout << "vec1 = " << vec1 << std::endl; 4 5RowVectorXd vec2(4); 6vec2 << 1, 4, 9, 16; 7std::cout << "vec2 = " << vec2 << std::endl; 8 9RowVectorXd joined(7); 10joined << vec1, vec2; 11std::cout << "joined = " << joined << std::endl; 12