Espacios de nombres
Variantes
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std::bernoulli_distribution

De cppreference.com
< cpp‎ | numeric‎ | random
 
 
 
Generación de números pseudoaleatorios
Motores y adaptadores de motor
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Engines and engine adaptors
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Generadores
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Generators
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Distribuciones
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Distributions
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Distribuciones uniformes
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Uniform distributions
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Bernoulli distribuciones
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Bernoulli distributions
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bernoulli_distribution
(C++11)
Poisson distribuciones
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Poisson distributions
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Distribuciones normales
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Normal distributions
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Distribuciones de muestreo
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Sampling distributions
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Secuencias de semillas
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Seed Sequences
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(C++11)
C biblioteca
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C library
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std::bernoulli_distribution
Las funciones miembro
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Member functions
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Generación
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Generation
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Características
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Characteristics
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Terceros funciones
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Non-member functions
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Definido en el archivo de encabezado <random>
class bernoulli_distribution;
(desde C++11)
Produce aleatorios valores booleanos, de acuerdo con la función de probabilidad discreta. La probabilidad de true es
Original:
Produces random boolean values, according to the discrete probability function. The probability of true is
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P(b|p) =

p if b == true 
1 − p if b == false

Contenido

[editar] Tipos de miembros

Miembro de tipo
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Member type
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Definition
result_type bool
param_type
el tipo del conjunto de parámetros, sin especificar
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the type of the parameter set, unspecified
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[editar] Las funciones miembro

construye nueva distribución
Original:
constructs new distribution
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(función miembro pública) [editar]
restablece el estado interno de la distribución
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resets the internal state of the distribution
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(función miembro pública) [editar]
Generación
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Generation
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genera el siguiente número aleatorio en la distribución
(función miembro pública) [editar]
Características
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Characteristics
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p devuelve el parámetro de distribución (probabilidad de generar true)
Original:
returns the p distribution parameter (probability of generating true)
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(función miembro pública) [editar]
obtiene o establece el objeto de parámetro de distribución
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gets or sets the distribution parameter object
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(función miembro pública) [editar]
devuelve el valor mínimo potencialmente generado
Original:
returns the minimum potentially generated value
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(función miembro pública) [editar]
devuelve el valor máximo potencialmente generado
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returns the maximum potentially generated value
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(función miembro pública) [editar]

[editar] Terceros funciones

compara dos objetos de distribución
(función) [editar]
realiza flujo de entrada y salida en la distribución de números pseudo-aleatorios
(función) [editar]

[editar] Ejemplo

#include <iostream>
#include <iomanip>
#include <string>
#include <map>
#include <random>
 
int main()
{
    std::random_device rd;
    std::mt19937 gen(rd());
    // give "true" 1/4 of the time
    // give "false" 3/4 of the time
    std::bernoulli_distribution d(0.25);
 
    std::map<bool, int> hist;
    for(int n=0; n<10000; ++n) {
        ++hist[d(gen)];
    }
    for(auto p : hist) {
        std::cout << std::boolalpha << std::setw(5) << p.first
                  << ' ' << std::string(p.second/500, '*') << '\n';
    }
}

Salida:

false ***************
 true ****

[editar] Enlaces externos

Weisstein, Eric W. "Bernoulli Distribution." De MathWorld - Un recurso del Web Wolfram .
Original:
Weisstein, Eric W. "Bernoulli Distribution." From MathWorld--A Wolfram Web Resource.
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