# Reduce in Rcpp11

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And now for something completely difference, the reduce function, doing something similar to what the Reduce function does in R:

#include <Rcpp.h> using namespace Rcpp ; // [[Rcpp::export]] double reduce_example(NumericVector x ){ auto add = [](double a, double b){ return a + b ;} ; return reduce(x, add ) ; } /*** R x <- 1:10 reduce_example(x) */

Giving:

$ Rcpp11Script /tmp/reduce.cpp > x <- 1:10 > reduce_example(x) [1] 55

To

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