R Statistics Cookbook

How to do it...

In this case, we will compare R against Rcpp (C++) for the following task. We will load a vector and a matrix. Our function will loop through each element of the vector, through each row, and through each row and column of that matrix, counting the number of instances where the elements of the matrix are greater than the ones in the vector.

1. Save the C++ code into a file named rcpp_example.cpp and we will source it from an R script:

#include <Rcpp.h>using namespace Rcpp;// [[Rcpp::export]]int bring_element (NumericVector rand_vector, NumericMatrix rand_matrix) {Rcout << "Process starting" << std::endl;int mcounter = 0;for (int q = 0; q < rand_vector.size();q++){    for (int x = 0; x < rand_matrix.rows();x++){ for (int y = 0; ...