1*bf2c3715SXin Li ArrayXi ind(5); ind<<4,2,5,5,3; 2*bf2c3715SXin Li MatrixXi A = MatrixXi::Random(4,6); 3*bf2c3715SXin Li cout << "Initial matrix A:\n" << A << "\n\n"; 4*bf2c3715SXin Li cout << "A(all,ind-1):\n" << A(all,ind-1) << "\n\n"; 5