|  | #include <Eigen/Core> | 
|  | #include <iostream> | 
|  |  | 
|  | // define a custom template unary functor | 
|  | template <typename Scalar> | 
|  | struct CwiseClampOp { | 
|  | CwiseClampOp(const Scalar& inf, const Scalar& sup) : m_inf(inf), m_sup(sup) {} | 
|  | const Scalar operator()(const Scalar& x) const { return x < m_inf ? m_inf : (x > m_sup ? m_sup : x); } | 
|  | Scalar m_inf, m_sup; | 
|  | }; | 
|  |  | 
|  | int main(int, char**) { | 
|  | Eigen::Matrix4d m1 = Eigen::Matrix4d::Random(); | 
|  | std::cout << m1 << std::endl | 
|  | << "becomes: " << std::endl | 
|  | << m1.unaryExpr(CwiseClampOp<double>(-0.5, 0.5)) << std::endl; | 
|  | return 0; | 
|  | } |