Call a function from c++ via environment Rcpp

Question

I am considering calling a R function from c++ via environment, but I got an error, here is what I did

#include 
using namespace Rcpp;



// [[         


        

Answer 1

fivenum function is not defined in the global environment but in the stats package enviroment, so you should get it from that:

...
Environment stats("package:stats"); 
Function f = stats["fivenum"];
...