c_cpp #rcpp #min #max

Posted 2021-05-14

// [[Rcpp::plugins(cpp11)]]
#include <Rcpp.h>

using namespace Rcpp;
using std::begin;
using std::end;
using std::min_element;
using std::max_element;

// [[Rcpp::export]]
double rcpp_min(NumericVector x) {
  NumericVector::iterator min_iter = min_element(begin(x), end(x));
  
  return *min_iter;
}

// [[Rcpp::export]]
double rcpp_max(NumericVector x) {
  NumericVector::iterator max_iter = max_element(begin(x), end(x));
  
  return *max_iter;
}


/*** R
r_vector <- 1:20

rcpp_min(r_vector)
#> [1] 1

rcpp_max(r_vector)
#> 20
*/