boost::normal_distribution funktioniert nicht



  • #include <iostream>
    #include <boost/random.hpp>
    using namespace std;
    using namespace boost;
    
    int main()
    {
        mt19937 generator(42);
     	normal_distribution<double> boostNormalRand(100,5);
    
        cout << "Mittelwert:"          << boostNormalRand.mean()  << endl;
        cout << "Standardabweichung: " << boostNormalRand.sigma() << endl;    
    
        for(int i=0; i<30; ++i)
            cout << boostNormalRand( generator ) << " ";   
    }
    

    Ergibt keine richtigen Werte (nur -1.#IND). Kann da jemand UnterstĂźtzung bieten?



  • Damit sollte es funktionieren. 😉

    #include <boost/random.hpp>
    #include <conio.h>
    #include <iostream>
    using namespace std;
    
    int main()
    {
     boost::mt19937 generator;
     boost::normal_distribution<> normal_dist(90,5);
     boost::variate_generator< boost::mt19937&, boost::normal_distribution<> > random(generator, normal_dist);
    
     cout << "Mittelwert:         " << normal_dist.mean()  << endl;
     cout << "Standardabweichung: " << normal_dist.sigma() << endl; 
     cout << "Varianz:            " << normal_dist.sigma()*normal_dist.sigma() << endl << endl; 
     for (int i=0;i<30;++i)
         cout << random() << endl;
    
       getch();
    }
    

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