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    std::negative_binomial_distribution

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    Bernoulli distributions
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    bernoulli_distribution(C++11)
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    std::negative_binomial_distribution
    Member-Funktionen
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    Member functions
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    negative_binomial_distribution::negative_binomial_distribution
    negative_binomial_distribution::reset
    Generation
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    Generation
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    negative_binomial_distribution::operator()
    Merkmale
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    Characteristics
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    negative_binomial_distribution::p
    negative_binomial_distribution::k
    negative_binomial_distribution::param
    negative_binomial_distribution::min
    negative_binomial_distribution::max
    Non-Member-Funktionen
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    Non-member functions
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    operator==
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    definiert in Header <random>
    template<class IntType =int>
    class negative_binomial_distribution;
    		(seit C++11)
    Erzeugt zufällige nicht-negative ganzzahlige Werte i, verteilt nach diskreten Wahrscheinlichkeitsfunktion:
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    Produces random non-negative integer values i, distributed according to discrete probability function:
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    P(i|k,p) =⎛
    ⎜
    ⎝    k + i − 1
    i    ⎞
    ⎟
    ⎠     · pk
     · (1 − p)i
    Der Wert stellt die Anzahl der Ausfälle in einer Reihe von unabhängigen Ja / Nein-Studien (jeweils gelingt es mit einer Wahrscheinlichkeit von p), vor genau k Erfolge auftreten .
    Original:
    The value represents the number of failures in a series of independent yes/no trials (each succeeds with probability p), before exactly k successes occur.
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    Inhaltsverzeichnis

    [Bearbeiten]Mitglied Typen

    Mitglied Typ
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    Member type
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    		 Definition
    result_typeIntType
    param_type
    die Art des Parametersatzes, nicht näher bezeichnet
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    the type of the parameter set, unspecified
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    [Bearbeiten]Member-Funktionen

    		 erzeugt eine neue Verteilung
    (öffentliche Elementfunktion)[edit]
    setzt den internen Zustand der Verteilung
    Original:
    resets the internal state of the distribution
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    (öffentliche Elementfunktion)[edit]
    Generation
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    Generation
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    erzeugt das nächste Zufallszahl in der Verteilung
    Original:
    generates the next random number in the distribution
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    (öffentliche Elementfunktion)[edit]
    Merkmale
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    Characteristics
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    gibt das k Verteilung Parameter (Anzahl der Studie Ausfälle)
    Original:
    returns the k distribution parameter (number of trial failures)
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    (öffentliche Elementfunktion)[edit]
    gibt das p Verteilungsparameter (Wahrscheinlichkeit einer Studie generierenden true)
    Original:
    returns the p distribution parameter (probability of a trial generating true)
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    (öffentliche Elementfunktion)[edit]
    ab oder legt die Verteilung Parameter-Objekt
    Original:
    gets or sets the distribution parameter object
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    (öffentliche Elementfunktion)[edit]
    gibt das Minimum potentiell generierten Wert
    Original:
    returns the minimum potentially generated value
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    (öffentliche Elementfunktion)[edit]
    gibt die maximale potentiell generierten Wert
    Original:
    returns the maximum potentially generated value
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    (öffentliche Elementfunktion)[edit]

    [Bearbeiten]Non-Member-Funktionen

    vergleicht zwei Verteilung Objekte
    Original:
    compares two distribution objects
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    (Funktion)[edit]
    Stream führt Eingabe und Ausgabe auf Pseudozufallszahl Verteilung
    Original:
    performs stream input and output on pseudo-random number distribution
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    (Funktion)[edit]

    [Bearbeiten]Beispiel

    #include <iostream>#include <iomanip>#include <string>#include <map>#include <random>   int main(){std::random_device rd;std::mt19937 gen(rd());// Pat goes door-to-door selling cookies// At each house, there's a 75% chance that she sells one box// how many times will she be turned away before selling 5 boxes? std::negative_binomial_distribution<> d(5, 0.75);   std::map<int, int> hist;for(int n=0; n<10000;++n){++hist[d(gen)];}for(auto p : hist){std::cout<< p.first<<' '<<std::string(p.second/100, '*')<<'\n';}}

    Output: 

    0 *********************** 1 ***************************** 2 ********************** 3 ************* 4 ****** 5 *** 6 * 7 8 9 10 11

    [Bearbeiten]Externer Links

    Weisstein, Eric W. "Negative Binomial Distribution." Von MathWorld - A Wolfram Web Resource .
    Original:
    Weisstein, Eric W. "Negative Binomial Distribution." From MathWorld--A Wolfram Web Resource.
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    Von „https://de.cppreference.com/mwiki/index.php?title=cpp/numeric/random/negative_binomial_distribution&oldid=27587“
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