ground/gcs/src/libs/eigen/doc/examples/class_CwiseUnaryOp_ptrfun.cpp

   1 #include <Eigen/Core>
   2 #include <iostream>
   3 using namespace Eigen;
   4 using namespace std;
   5
   6 // define function to be applied coefficient-wise
   7 double ramp(double x)
   8 {
   9   if (x > 0)
  10     return x;
  11   else
  12     return 0;
  13 }
  14
  15 int main(int, char**)
  16 {
  17   Matrix4d m1 = Matrix4d::Random();
  18   cout << m1 << endl << "becomes: " << endl << m1.unaryExpr(ptr_fun(ramp)) << endl;
  19   return 0;
  20 }