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std::discrete_distribution

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< cpp‎ | numeric‎ | random
 
 
 
Generación de números pseudoaleatorios
Motores y adaptadores de motor
Original:
Engines and engine adaptors
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Generadores
Original:
Generators
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Distribuciones
Original:
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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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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discrete_distribution
(C++11)
Secuencias de semillas
Original:
Seed Sequences
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(C++11)
C biblioteca
Original:
C library
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std::discrete_distribution
Las funciones miembro
Original:
Member functions
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Generación
Original:
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>
template< class IntType = int >
class discrete_distribution;
(desde C++11)
std::discrete_distribution produce enteros aleatorios en el intervalo [0, n), donde se define la probabilidad de cada individuo como i entero w
i
/S
, es decir el peso' del entero ith dividido por la suma de todos los pesos n .
Original:
std::discrete_distribution produces random integers on the interval [0, n), where the probability of each individual integer i is defined as w
i
/S
, that is the weight of the ith integer divided by the sum of all n weights.
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Contenido

[editar] Tipos de miembros

Miembro de tipo
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Member type
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Definition
result_type IntType
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
Original:
resets the internal state of the distribution
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(función miembro pública) [editar]
Generación
Original:
Generation
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genera el siguiente número aleatorio en la distribución
(función miembro pública) [editar]
Características
Original:
Characteristics
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obtiene la lista de probabilidades
Original:
obtains the list of probabilities
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(función miembro pública) [editar]
obtiene o establece el objeto de parámetro de distribución
Original:
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
Original:
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 <map>
#include <random>
 
int main()
{
    std::random_device rd;
    std::mt19937 gen(rd());
    std::discrete_distribution<> d({40, 10, 10, 40});
    std::map<int, int> m;
    for(int n=0; n<10000; ++n) {
        ++m[d(gen)];
    }
    for(auto p : m) {
        std::cout << p.first << " generated " << p.second << " times\n";
    }
}

Salida:

0 generated 4028 times
1 generated 978 times
2 generated 1012 times
3 generated 3982 times