accumulator , extracter result d'une density

Bonjour,

tout est dans le titre, il n'y a pas d'exemple sur la doc de boost.au secours la doc :cry:....
juste le format du result_type mais je ne comprends pas comment l'exploiter

Code:

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iterator_range<
    std::vector<
        std::pair<
            numeric::functional::average<sample-type, std::size_t>::result_type
          , numeric::functional::average<sample-type, std::size_t>::result_type
        >
    >::iterator
>

Code:

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//NE COMPILE PAS
#include <iostream>
#include <boost/accumulators/accumulators.hpp> 
#include <boost/accumulators/statistics/density.hpp>
#include <algorithm>
 
using namespace boost::accumulators;
 
int main()
{ 
	accumulator_set<double, stats<tag::density> > acc;
 
    acc(1.2);
    acc(8.3);
    acc(-3.4);
    acc(-4.5); 
 
	extractor< tag::density > ext_density;
 
	std::ostream_iterator< double > print( std::cout, ", " );
	std::copy( ext_density( acc ).begin(), ext_density( acc ).end(), print );
 
	std::cin.ignore();
}

Merci

#include <iostream> #include <boost/accumulators/accumulators.hpp> #include <boost/accumulators/statistics/stats.hpp> #include <boost/accumulators/statistics/density.hpp> #include <boost/array.hpp> #include <boost/bind.hpp> #include <boost/ref.hpp> #include <boost/random/normal_distribution.hpp> #include <boost/random/mersenne_twister.hpp> #include <boost/random/variate_generator.hpp> using namespace boost; using namespace boost::accumulators; int main() { const int SIZE = 100; mt19937 igen; variate_generator<mt19937, normal_distribution<> > gen(igen, normal_distribution<>()); typedef iterator_range<std::vector<std::pair<double, double> >::iterator > histogram_type; accumulator_set<double, features<tag::density> > acc(tag::density::num_bins = 20, tag::density::cache_size = SIZE); for(int i =0;i<SIZE;++i) acc(gen()); histogram_type hist = density(acc); for( int i = 0; i < hist.size(); i++ ) std::cout << "Bin lower bound: " << hist[i].first << ", Value: " << hist[i].second << std::endl; std::cin.ignore(); }