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  3. Optimizing R Code with Rcpp

Exercise

What happens when you compile this C++ file

Read the following C++ code chunk.

#include <Rcpp.h>
using namespace Rcpp ; 

double twice(double x){
    return x + x
}

This has been saved in a file given by the variable twice_file. What will happen if you compile this file with sourceCpp()?

Instructions

50 XP

Possible answers