1*bf2c3715SXin Li Matrix3d m = Matrix3d::Random(); 2*bf2c3715SXin Li cout << "Here is the matrix m:" << endl << m << endl; 3*bf2c3715SXin Li Matrix<ptrdiff_t, 3, 1> res = (m.array() >= 0.5).rowwise().count(); 4*bf2c3715SXin Li cout << "Here is the count of elements larger or equal than 0.5 of each row:" << endl; 5*bf2c3715SXin Li cout << res << endl; 6